单选题Which of the following best expresses the main idea of Paragraph 2?A Because of their characteristics as double organisms, it is difficult to classify lichens.B Over 15,000 varieties of lichens have been identified.C Double organisms should always be c
题目
Because of their characteristics as double organisms, it is difficult to classify lichens.
Over 15,000 varieties of lichens have been identified.
Double organisms should always be classified as separate species.
Taxonomists always find it difficult to classify new species of plants.
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更多“单选题Which of the following best expresses the main idea of Paragraph 2?A Because of their characteristics as double organisms, it is difficult to classify lichens.B Over 15,000 varieties of lichens have been identified.C Double organisms should always be c”相关问题
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第1题：
Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except ______
A.bacteria
B.moulds
C.yeasts
D.seals
正确答案：D
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第2题：
A customer has a p650 with a write-intensive database application. Recently the order entry team has complained about unusually slow response times. There have been no complaints from any other departments. Which of the following actions would most likely address the problem？（）
- A、Double the number of processors.
- B、Double the number of memory DIMMs.
- C、Double the number of network adapters.
- D、Double the number of SCSI buses and disks.
正确答案:D -
第3题：
Which of the following assignment is not correct？（）
- A、 float f = 11.1；
- B、 double d = 5.3E12；
- C、 double d = 3.14159；
- D、 double d = 3.14；.
正确答案:A -
第4题：
CDE is working. However, the customized PATH environment has not been implemented. Which of the following procedures should be performed to activate he implementation?（）
- A、Update the .kshrc file
- B、Edit $HOME/.dtprofile, and uncomment the DTSOURCEPROFILE=true
- C、Copy /etc/.profile $HOME/.dtprofile and edit the file as needed
- D、Double click on the System Administration icon and select CDE profile
正确答案:B -
第5题：
单选题Given the following script， why does the output come out as an empty line instead of "dog"（）#!/bin/ksh $VAR=dog echo "${VAR}"AThe $VAR variable was not exported.
BThe $VAR should have been set as VAR.
Cdog needs double quotes around it when setting $VAR.
DThe { } should not be around VAR in the echo command.
正确答案： B解析： 暂无解析 -
第6题：
单选题What would you say to the hotel receptionist to get a double room?ARent us a double room.
BBook us a double room.
CWe'd like to have a double room.
DLet 's have a double room.
正确答案： B解析： -
第7题：
单选题Questioning plays an important role for the classroom teaching. Which of the following questions does not belong to comprehension questions? _____AWhat is the main idea of this paragraph?
BCan you tell the difference between the two terms?
CCan you retell the text we have learned last week?
DCan you paraphrase the sentence in your own words?
正确答案： A解析：
提问在课堂教学中发挥着重要的作用。课堂教学可以采用多种提问形式。题目中只有C项属于对知识性问题的提问。 -
第8题：
单选题Which of the following best expresses the main idea of the passage?AThe extra increase in benefit rates for families with young children is more important than other issues.
BTo reduce poverty, the most important thing is to lower unemployment.
CTo narrow the gap between rich and poor, the benefit rates should be raised higher than inflation rate.
DThe government’s welfare reform programme has met strong criticism and opposition.
正确答案： B解析：
题目问的是：下列哪一项能最好地表达文章的中心思想？文章主要讲了贫富差距及其解决办法，其中之一就是将利率调得高于通货膨胀率。故C最符合题意。 -
第9题：
单选题Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.Abacteria
Bmoulds
Cyeasts
Dseals
正确答案： D解析： 暂无解析 -
第10题：
单选题If your vessel has a list to port due to negative GM and off-center weight, the first corrective measure you should take is to（）.Amove port-side main-deck cargo to the starboard side
Bfill the starboard double-bottom
Cpump water from the port double-bottom to the starboard double-bottom
Dpump water from the port double-bottom over the side
正确答案： A解析： 暂无解析 -
第11题：
单选题What’s the main idea of the passage?ARomance is a double-edged sword for adults.
BParents should forbid their children’s love.
CPuppy love may bring young people depression.
DRomance is good for young people.
正确答案： A解析：
文章第一段明确指出，早恋会给青少年带来压力，并可能会导致青少年抑郁。故文章关键词应包括早恋，青少年和抑郁，故答案为C。 -
第12题：
单选题Which of the following sentences is the main idea of this passage?AChildren in the Old Country are not as happy as their counterparts in America.
BAmerica is a country in which the concept of children is more emphasized than any other countries in the world.
CAdults in America are becoming increasingly useless.
DAdults should learn from their children because they are more energetic.
正确答案： C解析：
文章主旨题。该篇文章主要讲述了“孩子”这一概念从不存在到在美国的普遍使用，文章中指出美国是个孩子的王国，以孩子为中心，结合第四段第二句提到的“America is the greatest country in the world to grow up in because it is Kids Country.”可知它比其他国家更注重“孩子”的概念。因此选B。 -
第13题：
When rigging a stage，the standing part should be fastened to the horns of a stage with which of the following hitches ________．
A.Clove hitch
B.Timber hitch
C.Marlinespike hitch
D.Double blackwall hitch
正确答案：C
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第14题：
CDE is working. However, the customized PATH environment has not been implemented. Which of the following procedures should be performed to activate the implementation?（）
- A、Update the .kshrc file
- B、Edit $HOME/.dtprofile, and uncomment the DTSOURCEPROFILE=true
- C、Copy /etc/.profile to $HOME/.dtprofile and edit the file as needed
- D、Double click on the System Administration icon and select CDE profile
正确答案:B -
第15题：
Given the following script， why does the output come out as an empty line instead of "dog"（）#!/bin/ksh $VAR=dog echo "${VAR}"
- A、The $VAR variable was not exported.
- B、The $VAR should have been set as VAR.
- C、dog needs double quotes around it when setting $VAR.
- D、The { } should not be around VAR in the echo command.
正确答案:B -
第16题：
单选题Given the following script， why does the output come out as an empty line instead of "dog"？（）AThe $VAR variable was not exported
BThe $VAR should have been set as VAR
Cdog needs double quotes around it when setting $VAR
DThe { } should not be around VAR in the echo command
正确答案： B解析： 暂无解析 -
第17题：
单选题Which of the following phrases from the text best expresses the author’s conclusion about the meaning of the difference between left-eyed and right-eyed flatfish?A“most striking” (line 3, paragraph 1)
B“variation is adaptive” (line 2, paragraph 2)
C“mechanically disadvantageous” (line 7, paragraph 3)
D“evolutionary red herring” (line 8-9, paragraph 4)
正确答案： A解析：
细节题。由文章最后一段最后一句的 As for the left-eyed and right-eyed flatfish, their difference, however striking, appears to be an evolutionary red herring.可知本题答案是D项。 -
第18题：
单选题Which of the following does the writer explain?ANeurotoxins.
BMicroscopic organisms.
CPredators.
DFish walks.
正确答案： D解析：
细节题。第三段最后一句指出“This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing “fish walks” （fish trying to leave the water）…”，该句括号里的内容是对“fish walks”的解释，由此可知“fish walks”的原因是被这些微生物麻痹了神经，从而呼吸困难。因此选D。 -
第19题：
单选题If the ordered spare parts have been modified by manufacturer, which of the following should be pay attention to?（）Aquality
Breliability
Cprice fluctuating
Dapplicability
正确答案： B解析： 暂无解析 -
第20题：
单选题Which of the following best expresses the attitude of the author of Passage 2 toward the find (line 18) ?ARestrained optimism
BMild shock
CWarm acceptance
DHesitant passion
EMercurial endurance
正确答案： B解析：
第二篇文章中，作者将这项发现描述为“revealing”，“shed light”短语表明作者的态度是乐观的，故选A项。 -
第21题：
单选题A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.AA black ball in the forepart of her vessel
BA black double frustum of a cone
CA basket where best seen
DA black cone point upwards
正确答案： A解析： 暂无解析 -
第22题：
单选题Which of the following precautions should always be carried out in dry dock?（）ALiquids should never be transferred between tanks without consulting the dock master
BIf sea valves have been disassembled, all bonnets must be checked for leakage when the ship is re-floated
CBefore re-floating, all sea chest strainers should be verified as having been replaced
DAll of the above
正确答案： C解析： 暂无解析 -
第23题：
单选题Which of the following assignment is not correct？（）Afloat f = 11.1；
Bdouble d = 5.3E12；
Cdouble d = 3.14159；
Ddouble d = 3.14；.
正确答案： B解析： 浮点数的赋值是带有小数点的数字缺省是double型的，如果在浮点数后面加f或者F则是float，后面加d或者D则是double，科学计数法形式的浮点数也是double型的，而double的精度比float高，将一个高精度的double赋值给一个低精度的float时需要进行强制类型转换，反之则不需要。