问答题The second most important constituent of the biosphere is liquid water.This can only exist in a very narrow range of temperatures, since water freezesat 0℃ and boils at 100℃ This is only a tiny range compared with the low tem-peratures of some other pl
题目
问答题
The second most important constituent of the biosphere is liquid water.This can only exist in a very narrow range of temperatures, since water freezesat 0℃ and boils at 100℃ This is only a tiny range compared with the low tem-peratures of some other planets and the hot interior of the earth, let the tem- 1．_______perature of the sun. As we know, life would only be possible on the face of a 2．_______planet had temperatures somewhere within this range. 3．_______ The earth’s supply of water probably remains quite fairly constant in 4．_______quantity. A certain number of hydrogen atoms, which are one of the mainconstituents of water, are lost by escaping from the atmosphere to out space, 5．_______but they are probably just about replaced by new water rising away from the 6．_______depths of the earth during volcanic action. The total quantity of water is notknown, and it is about enough to cover the surface of the globe to a depth of 7．_______about two and three-quarter kms. Most of it—97%—is in the form of the saltwaters of the oceans. The rest is fresh, but three quarter of this is in the form of 8．_______ice at the Poles and on mountains, and cannot be used by living systems when 9．_______melted. Of the remaining fraction, which is somewhat fewer than 1% of the 10．_______whole, there is 10-20 times as much stored as underground water as is actual-ly on the surface. There is also a minor, but extremely important, fraction ofthe water supply which is present as water vapour in the atmosphere.欢迎使用ueditor!
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第1题：
Only a very delicate thermometer can ________ such tiny changes in temperature in a precise way.
A、count
B、relate
C、measure
D、number
正确答案:C
-
第2题：
Can people smoke in the plane?
A．N0，they can’t．
B．Yes，but only in some areas of the place．
C．Yes，but only in the cabin．
D．It is not mentioned in the announcement．
正确答案：B
谈话者提到了可以吸烟“smoking is permitted on the right hand side of the passenger cabin…”，可得到B正确。 -
第3题：
共用题干
第一篇
Water Resources on the Earth
The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.The word"fraction"in the second paragraph means________.
A:a large area
B:a very small amount
C:an important system
D:a major source of information答案：B解析：文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。 -
第4题：
共用题干
第一篇
Water Resources on the Earth
The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.Liquid water only exists________.
A: in the center of the earth
B:on the surface of our planet
C:in the coastal areas of the earth
D:in a very narrow range of temperatures答案：D解析：文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。 -
第5题：
共用题干
第一篇
Water Resources on the Earth
The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.The total quantity of water on Earth________.
A:has greatly increased in recent years
B:remains almost unchanged
C:is decreasing constantly
D:is affected by global warming答案：B解析：文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。 -
第6题：
共用题干
The Sea
What do you know about the sea?We know that it looks very pretty when the sun is shining on it.We
also know that it can be very rough when there is a strong wind.What other things do we know about it?The
first thing to remember is that the sea is very big.When you look at the map of the world you will find there
is more water than land.The sea covers three quarters of the world.
The sea is also very deep in some places.It is not deep everywhere.Some parts of the sea are very shal-
low.But in some places the depth of the sea is very great.There is one spot,near Japan,where the sea is
nearly 11 kilometers deep!The highest mountain in the world is about 9 kilometers high.If that mountain
were put into the sea at that place,there would be 2 kilometers of water above it！What a deep place!
If you have swum in the sea,you know that it is salty.You can taste the salt,Rivers,which fi0w into the
sea.carry salt from the land into the sea.Some parts of the sea are saltier than other parts,There i、one sea,
called the Dead Sea,which is very salty.It is so salty that swimmers cannot sink!Fish cannot live in the
Dead Sea!
In most parts of the sea,there are plenty of fishes and plants.Some live near the top of the sca.Othurs
live deep down.There are millions of tiny living things that float in the sea.These floating things are so small
that it is hard to see them.Many fish live by eating them.
The sea can be very cold.Divers,who go deep down in the sea,know this.On the top the water may be
warm.When the diver goes downwards,the sea becomnes colder and colder. Another thing happens.When the
diver goes deeper,the water above presses down on him.It squeezes him.Then the diver has to wear clothes
made of metal.But he cannot go very deep.Some people who wanted to go very deep used a very strong diving
ship!They went down to the deepest part of the sea in it.They went down to a depth of eleven kilometers!The deeper a diver goes down in the sea,the greater water pressure he bears?
A:Right
B: Wrong
C:Not mentioned答案：A解析：第一段说“当阳光普照大海时大海看起来很美丽”，但并没说“风平浪静”时也是如此。
第一段的最后一句话说海洋覆盖了地球四分之三的面积，由此可推知陆地只占地球 25％的面积。
第二段涉及大海的深度，但并没说到“平均深度”。
第二段说死海咸度大，鱼类不能生存，但并没说所有生物都不能生存。
第四段说在绝大多数海域，有丰富的鱼类和植物，有些生活在海洋表层，有些居住在深 海，因此说越往海洋深处鱼类和植物越少是没有道理的。
由第五段可知潜水员潜得越深，其承受的水压就越大。
文章结尾说潜水员潜往深水区时，乘坐极其坚固的潜水船是为了抵抗水压而不是为了 防寒。第3部分：概括大意与完成句子 -
第7题：
问答题The second most important constituent of the biosphere is liquid water.This can only exist in a very narrow range of temperatures, since water freezesat 0℃ and boils at 100℃ This is only a tiny range compared with the low tem-peratures of some other planets and the hot interior of the earth, let the tem- 1．_______perature of the sun. As we know, life would only be possible on the face of a 2．_______planet had temperatures somewhere within this range. 3．_______ The earth’s supply of water probably remains quite fairly constant in 4．_______quantity. A certain number of hydrogen atoms, which are one of the mainconstituents of water, are lost by escaping from the atmosphere to out space, 5．_______but they are probably just about replaced by new water rising away from the 6．_______depths of the earth during volcanic action. The total quantity of water is notknown, and it is about enough to cover the surface of the globe to a depth of 7．_______about two and three-quarter kms. Most of it—97%—is in the form of the saltwaters of the oceans. The rest is fresh, but three quarter of this is in the form of 8．_______ice at the Poles and on mountains, and cannot be used by living systems when 9．_______melted. Of the remaining fraction, which is somewhat fewer than 1% of the 10．_______whole, there is 10-20 times as much stored as underground water as is actual-ly on the surface. There is also a minor, but extremely important, fraction ofthe water supply which is present as water vapour in the atmosphere.欢迎使用ueditor!正确答案：
1.在let后加alone let alone是固定短语,作“更不用说”讲。
2.将face改为surface on the surface of在…的表面上。face没有“表面”的意思。
3.在planet后加which/that;或将had改为having/with 此处为修饰先行词a planet的定语。
4.去掉fairly或quite fairly和quite是同义词,两个词都用会重复。
5.out改为outer “外层空间”用outer space。
6.去掉away rise from“从…中升起”。没有rise away这种词组。
7.and改为although 这里的两个分句是转折关系,不是并列关系。
8.quarter改为quarters quarter是可数名词,被three修饰,要用复数。
9.when改为unless/until/before 此句要表达“只有融化后这些冰才可以被利用”。用when句意为“融化后这些冰就不能被利用”。
10.fewer改为less fresh water是不可数名词,要用little及其变形来修饰。解析： 暂无解析 -
第8题：
问答题Most people would describe water like a colorless liquid. They (1) _______would know that in very cold conditions it becomes a solid calledice and that when heating on a fire it becomes a vapor called steam. (2) _______However, water, they would say, is a liquid. We have learned thatwater consists of molecules composed with two atoms of hydrogen (3) _______and one atom of oxygen, which we describe by the formula H2O.This is equally true of the solid called ice and the gas called steam.Chemically there is no difference between the gas, the liquid, andthe solid, all of which is made up of molecules with the formula H2O. (4) _______This is true of other chemical substances; most of them can exist asgases or as liquids or as solids. We may normally think of iron as asolid, but if we will heat it in a furnace, it will melt and become a (5) _______liquid, and at very high temperatures it will become a gas. Nothingvery permanent occurs when a gas changes into a liquid or a solid.Everyone knows that ice, which has been made by freezing water,can be melted again by warmed and that steam can be condensed (6) _______on a cold surface to become liquid water. In fact, it is only becausewater is so a familiar substance that different names are used for (7) _______the solid, liquid and gas. Most substances are only familiar with (8) _______us in one state, because the temperatures requiring to turn them (9) _______into gases are very high, or the temperatures necessary to turn theminto solids are so low. Water is an exception in this respect, whichis another reason why its three states have given three different (10) _______names.正确答案：
1.like改为as describe sth. as sth.“将……描述成……”,是固定说法。
2.heating改为heated 此处为时间状语从句,从句和主句主语一致,从句主语和be的变化形式可以省略。
3.with改为of be composed of是固定搭配,意为“包括,由……组成”。
4.is改为are which指代the gas, the liquid, and the solid,表示复数概念,应该用are。
5.去掉第一个will 在时间条件状语从句和条件状语从句中用现在时表示将来。
6.by改为when when warmed等于when it is warmed,it is可以省略。
7.so改为such so+ adj.+ a(n)+n.和such a(n)+adj.+ n.是固定说法,没有so+ a(n)+ adj. +n.这种说法。
8.with改为to A be familiar to B指“B熟悉A”;A be familiar with B 指“A熟悉B”。
9.requiring改为required temperatures和require是逻辑动宾关系。
10.have后加been 动词give和主语three states是动宾关系,所以这里要使用被动语态。解析： 暂无解析 -
第9题：
单选题Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means （）.Acast iron has weakness
Bcast iron can stand up shock loading
Ccast iron fittings are only suitable in low pressure situation
Deast iron fittings are not suitable in low pressure situation
正确答案： C解析： 暂无解析 -
第10题：
单选题The spray of water in low-velocity fog will have（）.Agreater range than high-velocity fog
Blesser range than high-velocity fog
Cabout the same range as high-velocity fog
Dgreater range than a solid stream
正确答案： D解析： 暂无解析 -
第11题：
问答题Culture is not just a matter of language; it involves the intellect, emotions, and—to me the most important of all—our senses. It is our instinctive responses that invariably reveal our cultural affiliations. Language is one obvious indicator; few people would shout out sudden pain and pleasure in a second language. But there are clear non-linguistic indicators as well, one of the most important being our preferences for food, particularly when feel unwell. All these can perhaps be summed up as “gut feelings”. Since these are responses uncamouflaged by our own or other people’s, manipulation and wishful thinking, they are very reliable.My two worlds not only sounded different, but also had different smells, textures and each moved to different rhythm. I was intrigued by the tangibility of that difference. It was like looking at two paintings, one a traditional Chinese landscapes, the other an impressionist work. Only I wasn’t just looking at them, I was living in a both of them simultaneously.正确答案：
文化并不限于语言那么简单,它包含了思想、感情和我认为特别重要的一环——感官反映。要知道自己的文化倾向,最准确的指标可以说是我们的直觉反映。语言固然是其中一种指标,因为没有多少人会用第二种语言来表达突如其来的痛楚或伤感。但同样我们也有非常明显的非语言指标,其中一项很重要的就是对食物的偏爱,特别是身体不舒服的时候想吃什么。上面所说的种种,大概可以概括地称为“本能感觉”。正因为这些反映完全不受我们自己或别人的希望支配和伪装,所以准确性很高。
我的两个世界不但有不同的声音,而且有不同的气味、质感,更以不同的节奏运作。如此具体的分别,令当年的我感到很奇妙,那种感觉就像同时看着两幅画,一幅是传统中国山水画,另一幅是欧洲印象派作品。但有一个很重要的分别:我不是在看画,而是同时生活在两幅画中。解析： 暂无解析 -
第12题：
单选题One can narrow the search by specifying the range of employees, revenue and export figures, accepting only those companies that fall within the requested area.Aavenue
Bimport
Ccompensate
Dearnings
正确答案： B解析：
名词辨析。revenue指“（产业、投资等的）收益”。earning挣得的财物，收入，收益。avenue林荫道，大街；途径。import进口（商品）；输入；意义。compensate为动词，意为“补偿；酬报；抵消”。 -
第13题：
What will happen if a private IP address is assigned to a public interface connected to an ISP?()A. Addresses in a private range will be not routed on the Internet backbone.
B. Only the ISP router will have the capability to access the public network.
C. The NAT process will be used to translate this address in a valid IP address.
D. Several automated methods will be necessary on the private network.
E. A conflict of IP addresses happens, because other public routers can use the same range.
参考答案：A
-
第14题：
Firefighting foam is only effective when the foam _____.
A.penetrates to the bottom of the fire
B.is kept saturated with low-velocity water fog
C.mixes with the burning fuel oil
D.completely covers the top of the burning liquid
正确答案：D
泡沫灭火仅在当泡沫完全覆盖在燃烧液体的上面时才有效。 -
第15题：
共用题干
第一篇
Water Resources on the Earth
The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.Most of the fresh water on Earth________.
A:is in the form of ice at the poles and on mountains
B:is stored underground
C:is found in rivers and lakes
D:comes from the rain答案：A解析：文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。 -
第16题：
共用题干
第一篇
Water Resources on the Earth
The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.There is more of rainfall________.
A:over the mountains than over the rivers
B:over the rivers than over the mountains
C:over the land than over the oceans
D:over the oceans than over the land答案：C解析：文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。 -
第17题：
共用题干
The Sea
What do you know about the sea?We know that it looks very pretty when the sun is shining on it.We
also know that it can be very rough when there is a strong wind.What other things do we know about it?The
first thing to remember is that the sea is very big.When you look at the map of the world you will find there
is more water than land.The sea covers three quarters of the world.
The sea is also very deep in some places.It is not deep everywhere.Some parts of the sea are very shal-
low.But in some places the depth of the sea is very great.There is one spot,near Japan,where the sea is
nearly 11 kilometers deep!The highest mountain in the world is about 9 kilometers high.If that mountain
were put into the sea at that place,there would be 2 kilometers of water above it！What a deep place!
If you have swum in the sea,you know that it is salty.You can taste the salt,Rivers,which fi0w into the
sea.carry salt from the land into the sea.Some parts of the sea are saltier than other parts,There i、one sea,
called the Dead Sea,which is very salty.It is so salty that swimmers cannot sink!Fish cannot live in the
Dead Sea!
In most parts of the sea,there are plenty of fishes and plants.Some live near the top of the sca.Othurs
live deep down.There are millions of tiny living things that float in the sea.These floating things are so small
that it is hard to see them.Many fish live by eating them.
The sea can be very cold.Divers,who go deep down in the sea,know this.On the top the water may be
warm.When the diver goes downwards,the sea becomnes colder and colder. Another thing happens.When the
diver goes deeper,the water above presses down on him.It squeezes him.Then the diver has to wear clothes
made of metal.But he cannot go very deep.Some people who wanted to go very deep used a very strong diving
ship!They went down to the deepest part of the sea in it.They went down to a depth of eleven kilometers!The Dead Sea is so salty that nothing can live in it.
A:Right
B:Wrong
C:Not mentioned答案：C解析：第一段说“当阳光普照大海时大海看起来很美丽”，但并没说“风平浪静”时也是如此。
第一段的最后一句话说海洋覆盖了地球四分之三的面积，由此可推知陆地只占地球 25％的面积。
第二段涉及大海的深度，但并没说到“平均深度”。
第二段说死海咸度大，鱼类不能生存，但并没说所有生物都不能生存。
第四段说在绝大多数海域，有丰富的鱼类和植物，有些生活在海洋表层，有些居住在深 海，因此说越往海洋深处鱼类和植物越少是没有道理的。
由第五段可知潜水员潜得越深，其承受的水压就越大。
文章结尾说潜水员潜往深水区时，乘坐极其坚固的潜水船是为了抵抗水压而不是为了 防寒。第3部分：概括大意与完成句子 -
第18题：
What will happen if a private IP address is assigned to a public interface connected to an ISP?（）
- A、Addresses in a private range will be not routed on the Internet backbone.
- B、Only the ISP router will have the capability to access the public network.
- C、The NAT process will be used to translate this address in a valid IP address.
- D、Several automated methods will be necessary on the private network.
- E、A conflict of IP addresses happens, because other public routers can use the same range.
正确答案:A -
第19题：
单选题Just-in-time inventory control system ______.Ais adopted in most modem industries
Bis adopted only in very small company
Cis adopted only by some people
Dis adopted long long time ago
正确答案： B解析：
最后一段最后一句指出“Most modern industries try to keep inventory as low as possible, but when they adopt just-in-time inventory control…”，因此to keep inventory as low as possible与just-in-time inventory control表达内容相一致，由此可知零部件库存管理被大多数现代公司所采用。 -
第20题：
单选题What is an advantage of using foam in fire fighting?（）AIt is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)
BMost foams can be used with dry chemicals to attack a fire by two methods
CFoam is effective on combustible metal fires
DFoam can be made with seawater or fresh water
正确答案： B解析： 暂无解析 -
第21题：
问答题Practice 4 Both language and culture are learned by children without special organized programs of instruction, but motivation to learn is very high since language is the most effective means for a child to obtain what he or she wants. If the learning of a new language begins before lower adolescence, one is likely to be able to speak such a language with complete naturalness, but if learned after upper adolescence some hangover of a mother-tongue feature is very likely to persist. But not only do languages exhibit such learning patterns, but so do cultural traits, for example, shaking hands, kissing, and embracing. Although many persons assume that languages exist in dictionaries and grammars, in fact they only exist in people’s heads. But this is equally true of cultural traits, which indicate clearly a they only exist in people’s heads. But this is equally true of cultural traits, which indicate clearly a person’s value system when crucial decisions need to be made before there is any time to think about alternatives, for example, diving into a flooding stream to rescue a drowning child.正确答案： 【参考译文】
儿童学习语言和文化,无须专门编制的教学计划,但他们的学习积极性很高,因为他们获得想要的东西,语言即是最有效的手段。如果一个人十来岁开始学习一门新的语言,日后他就有可能轻松自如地说这门语言。但如果到十六、七岁才学,那么他说话时多半会夹杂一些母语的痕迹。不仅语言学习呈现这种模式,文化特征,如握手、接吻和拥抱,也同样如此。
尽管许多人认为语言存在于词典和语法中,然而事实上语言仅存在于人们的头脑里。文化特征亦然。在没有时间考虑何取何舍而必须作出关键性决定时,如跳入泛滥的河水去救一个溺水的孩子,文化特征会清楚地表现出一个人的价值体系。解析： 暂无解析 -
第22题：
单选题What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）ARefrigerator
BRefrigerant
CCooling medium
DBrine
正确答案： A解析： 暂无解析 -
第23题：
问答题As holidays go, Thanksgiving is in some ways the most philosophical. Today we try not to take for granted the things we almost always take for granted. We try, if only in that brief pause before the eating begins, to see through the well-worn patterns of our lives to what lies behind them. In other words, we try to understand how very rich we are, whether we feel very rich or not. Today is one of the few times most Americans consciously set desire aside, if only because desire is incompatible with the gratitude—not to mention the abundance-that Thanksgiving summons.正确答案：
与其他节日相较,感恩节可说是最具反思意义的。今天,我们试着不像往常一样,把拥有的一切视为理所当然,而是试着透视一成不变的生活模式,探究隐藏在背后的真意,即使只是趁着用餐前的短暂片刻也无妨。换言之,我们试着了解自己有多富有,不论事实上我们是否真感到富有。今天,多数美国人难得将欲望刻意抛在一旁,即使这纯粹是因为欲望与感恩节唤起的感恩之心(更遑论丰盛的食物)扦格不入也无妨。解析： 暂无解析 -
第24题：
单选题Firefighting foam is only effective when the foam（）.Apenetrates to the bottom of the fire
Bis kept saturated with low-velocity water fog
Cmixes with the burning fuel oil
Dcompletely covers the top of the burning liquid
正确答案： B解析： 暂无解析