People are confused in their attempts to control malaria in Europe in the early 1900s, because scientists ______.A．identified only one mosquito species instead of six speciesB．thought only three mosquito species transmitted diseaseC．thought there was only
题目
People are confused in their attempts to control malaria in Europe in the early 1900s, because scientists ______.
A．identified only one mosquito species instead of six species
B．thought only three mosquito species transmitted disease
C．thought there was only one mosquito species
D．did not know what species was being studied
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更多“People are confused in their attempts to control malaria in Europe in the early 1900s, because scientists ______.A．identified only one mosquito species instead of six speciesB．thought only three mosquito species transmitted diseaseC．thought there was only”相关问题
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第1题：
Millions of people are in danger of getting malaria because______.
A. some countries have not started a campaign against mosquitoes
B. new species of mosquitoes may survive today's sprays
C. malaria was once thought to be a very old evil of the world
D. present sprays are not as effective as people think
正确答案：B
[解析] 见第二段最后一句话。
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第2题：
Time was when biologists somewhat over worded the evidence that these creatures preserve the health of game by killing the physically weak,or that they prey only on “worthless species。
正确答案：
Time was when biologists somewhat over worded the evidence that these creatures preserve the health of game by killing the physically weak,or that they prey only on “worthless species。
解析：主干time was when...。when引导了表语从句。Time was when可看作固定短语，译为“从前，曾经”。注意两个并列同位语从句的翻译。
参考译文：曾几何时，生物学家总是重述以下的这条证据：这些生物通过捕食弱小的动物去维持生物链的正常运行，或它们只是去捕食“没有价值的物种”。 -
第3题：
CDC considered the outbreak of West Nile in 1999 as a consequence of
[A] the abolition of the mosquito-control programs.
[B ] the surviving mosquito-borne infections.
[C] the abuse of some $ 50 million in funds.
[D] its failure to conquer mosquito-borne diseases.
正确答案：A
53.A【精析】该题为细节题。根据第三段第一句和第二句“When West Nile hit New York City in 1999, the CDC realized it was a victim of its own success. Because health officials had conquered most mos- quito-borne diseases decades ago, many states abolished their mos- quito-control programs．”我们知道，1999年西尼罗河病毒在纽约大规模传播，疾病控制中心的官员意识到，纽约成为其成功的牺牲品，因为几十年前，公共卫生官员已经攻克了以蚊子为传染源的疫病，所以很多州废除了蚊子控制项目，故选择A项。 2009年9月参考答案及精析第7页（共12页） -
第4题：
— Were all three people in the car injured in the accident?— No, ______ only the two passengers who got hurt.A there is
B it were
C there was
D it was
参考答案：D
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第5题：
The White Fountain inn will__________reservations only for parties of six people or more.A.aceept
B.accepting
C.aecepted
D.accepts答案：A解析：“will”是情态动词，后跟动词原形。 -
第6题：
共用题干
第二篇
Human and the Earth
In terms of the evolution of life on Earth,human beings have just arrived.Despite their shori time on Earth,however,people have brought about enormous changes to the surface of the planet一changes far out of proportion to the interval of time they have occupied it.
People have more control over their surroundings than any other species on Earth.With the combination of intelligence and manual skill(allowing us to make and use tools),people have found ways to use plant and animal resources,mineral ores,fuels,and many other materials and resources from the Earth.
As the number of people on Earth increases,it becomes increasingly difficult for the population to survive on the resources of the land.The amount of land is limited.Although agricultural production can be increased by use of machinery such as tractors and the addition of fertilizer,the land ultimately can produce only so much food and no more.
As the human population grows,people consume more.Clearly,some locations on Earth already have too many people;in many of these areas,future increases will surely bring about more poverty and suffering. Yet people in rich nations use proportionally far more of the available resources than people in poorer nations.As they consume these resources without restraint,they also waste large amounts of them.
People are only a very small fraction of all the living things on the planet.Yet their numbers create a drain on resources that can't be renewed.For example,the amount of water on Earth is limited,this water is cleaned through natural processes.However,the natural processes for filtering water can clean only a certain amount of water by removing the pollution.Likewise,a limited amount of petroleum can be found under the Earth's surface.Petroleum is a valuable resource.Should people use it up to manufacture petrol for automobiles?As people work to control the planet and make life comfortable,are they using up resources that are needed for their survival?Why have people more control over their surroundings than any other species on Earth?
A:Because of their intelligence and manual skill.
B:Because they can use plant and animal resources,mineral ores and fuels.
C:Because they are cleverer than any other animals on Earth.
D:Both A and B.答案：D解析：文章第一段第一句话提到“就地球上生命的进化而言，人类是姗姗来迟者”，因此比较而言，人类的历史并不长。选项A是正确的。
从文章第二段第二句话“With the combination of intelligence and manual skill...”我们知道选项A和B都是正确的，因此选择D项。
文章第三段提到，土地的总量是有限的。虽然使用拖拉机等机械和施用化肥可以提高农业产量，但是土地最终所能产出的粮食只有那么多，不会再增加。因此只有选项C是正确的。
文章第四段第三句说富裕国家的人们所使用的能源在比例上远远大于贫穷国家的人们。选项C中提到的“发达国家的人们”最符合题意。
根据文章最后一段关于资源的描述我们可以发现选项A、B、C都是正确的，只有选项D的表述错误，因此选择D项。 -
第7题：
Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command： RESTORE CONTROLFILE FROM AUTOBACKUP； Which of the following statements is true？（）
- A、 The command restores only the missing control file.
- B、 The command restores all the control files.
- C、 The command fails because the database is running.
- D、 This is the correct way to address this problem.
- E、 This is not the correct way to address this problem.
正确答案:C,E -
第8题：
One of the tablespaces is read/x7fonly in your database. The loss of all control files forced you to re/x7fcreate the control file. Which operation do you need to perform after re/x7fcreating the control file and opening the database？（）
- A、drop and recreate the readonly tablespaces
- B、rename the readonly data files to their correct file names
- C、change the tablespace status from read/write to readonly
- D、recreate the readonly tablespace because it is automatically removed
正确答案:B -
第9题：
多选题Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command： RESTORE CONTROLFILE FROM AUTOBACKUP； Which of the following statements is true？（）AThe command restores only the missing control file.
BThe command restores all the control files.
CThe command fails because the database is running.
DThis is the correct way to address this problem.
EThis is not the correct way to address this problem.
正确答案： C,E解析： 暂无解析 -
第10题：
单选题Just-in-time inventory control systemAis adopted in most modern industries.
Bis adopted only in very small company.
Cis adopted only by some people.
Dis adopted long long time ago.
正确答案： C解析：
从文中的最后一句话“Most modern industries…but when they adopt just-in-time inventory control…”可知答案选A。 -
第11题：
问答题In one day at a library, 64 people borrowed books. Twice as many people borrowed only a thriller as borrowed only a science fiction book. Three people borrowed a biography only and 11 people borrowed both science fiction and a thriller, but not a biography. The same number borrowed a biography and a thriller but no science fiction as borrowed one of each of the three types. Twenty-one people did not borrow a thriller. One more person borrowed a science fiction book and a biography book than borrowed a biography only. How many people borrowed a thriller only?正确答案： 28 people borrowed a thriller only.解析：
(设三种书都借的人数为X, 那么既借传记又借惊险小说的人数也为X; 设既借传记又借科幻小说的人数为Y；设只借科幻小说的人数为Z，那么只借惊险小说的人数为2Z。根据题意可知：Y=4; Y+Z+3=21; 3Z+2X+Y+11+3=64, 故求出Z=14, 2Z=28.) -
第12题：
单选题If a mosquito were to bite a person. and that person were later to develop malaria and die of the disease, it is most likely that the person was infected with which of the following?AAnopheles gambiae
BAnopheles semiovale
CPlasmodium malariae
DPlastoodium vivax
EPlasmodium falciparum
正确答案： B解析：
推断题。由文章最后一句“Of these species, P. falciparum accounts for the majority of infections and approximately 90 percent of malaxial deaths in the world.”可知，本题选E项。 -
第13题：
Passage One
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home.
Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as hibernation.
There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.
One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice.
Some animals that fall into a wintertime sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.
Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.
36. Hibernation is a seasonal practice. This means it ______.
A. takes place only during a particular season
B. occurs only during the night
C. is a daily practice
D. only happens when a species becomes over-populated
正确答案：A
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第14题：
Why is it a problem if all the smaller fish species die?
A. It's not healthy for the environment.
B. People only like to catch big fish.
C. There are too many small fish.
D. The smaller fish can get lost in the lake.
正确答案：A
55．第一段最后一句。说明其他物种的消失会破坏环境。选项 A是正确的。 -
第15题：
Mr.Wang is the only one of the people here who ( )able to drive a truck.A、is
B、can be
C、are
D、have been
参考答案：A
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第16题：
We must stress that this offer is firm for three days only because of the heavy demand () the limited supplies of this velvet in stock.
A、for
B、on
C、of
D、in
参考答案：A
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第17题：
The White Fountain inn will __________reservations only for parties of six people or more.A.accept
B.accepting
C.accepted
D.accepts答案：A解析：“will”是情态动词，后跟动词原形。 -
第18题：
At least how many tests were carried out by the scientists referred to in this passageA.Three
B.Two
C.Only one
D.No one knows答案：A解析： -
第19题：
Which one of the following describes who will be able to see an existing doc that contains a readers field ?（）
- A、only those people listed in the access list
- B、anyone listed as a reader or above in the acl
- C、only those people list in the readers field
- D、anyone list as a reader or above in the acl and who is also list in the readers field
正确答案:D -
第20题：
Identify three correct statements of a multi-org setup. （）(Choose three.)
- A、A Government Reporting Entity (GRE)/Legal Entity can point to one and only one Set of Books.
- B、Inventory Orgs can be associated directly with a GRE/Legal Entity.
- C、The creation of a Master Inventory organization is mandatory.
- D、One and only one Operating Unit can be associated with a GRE/Legal Entity.
- E、One Set of Books can have one or many GRE's/Legal Entities associated with it.
正确答案:A,C,E -
第21题：
单选题One of the tablespaces is read-only in your database. The loss of all control files forced you to re-create the control file. Which operation do you need to perform after re-creating the control file and opening the database？（）Adrop and re-create the read-only tablespaces
Brename the read-only data files to their correct file names
Cchange the tablespace status from read/write to read-only
Dre-create the read-only tablespace because it is automatically removed
正确答案： C解析： 暂无解析 -
第22题：
单选题Although many people would not believe it, the mosquito is actually the most dangerous animal in Africa. While the bite of the black mamba is invariably lethal when untreated, this dreaded snake kills only a few dozen people per year. Hippopotami, with their immense strength and foul dispositions, kill hundreds of people per year in rivers and lakes, but the mosquito is still more dangerous. Mosquitoes bite hundreds of millions of people in Africa every year, and they infect over a million each year with malaria, a disease that is often fatal. Which of the following questions would be most useful in evaluating the claim made above regarding the mosquito?ACould a person survive an attack by a black mamba if that person received prompt medical attention?
BWhat criteria are used to determine which animal is the “most dangerous” animal?
CCould the incidence of mosquito bites be decreased through the judicious use of pesticides and insect repellent?
DDoes malaria kill more people per year in Africa than tuberculosis?
EHow does the percentage of people who survive hippopotamus attacks in Africa each year compare with the percentage of people who survive mosquito bites?
正确答案： C解析：
文段中对于非洲蚊子的结论是：“the mosquito is actually the most dangerous animal in Africa.”，之后作者比较了蚊子和其他生物的致死率的数据，故B问题能更好的帮助我们估计这一结论，故本题选B。 -
第23题：
单选题Which of the following is NOT mentioned as a quality of email?AIt is a convenient communication tool.
BIt allows conversations at different times.
CIt is as easy to email a message to many people as to only one.
DIt helps control social activities.
正确答案： D解析：
关于电子邮件的性质，录音中提到“Email enables people to maintain more relationships easily because it is convenient as a communication tool...”，(电子邮件使人们易于维持更多的关系因为作为交流工具它很方便…)，所以A项正确；The nature of email is such that people could carry on conversations at different times and at their leisure(电子邮件的本质是人们可以在不同的时间和在空闲时间进行谈话)，所以B项也正确；it is almost as easy to email a message to many people as it is to email to only one(给许多人发电子邮件几乎和只给一个人发电子邮件一样简单)，C项也正确；只有D项的没有在文中被提及。