Increased leisure time in the United Stated has not changed the idea work and play are distinct activities．( )A．whatB．whichC．thatD．whether 题目和参考答案——青夏教育精英家教网——

题目内容

20．Increased leisure time in the United Stated has not changed the idea _____ work and play are distinct activities．（　　）

A．

what

B．

which

C．

that

D．

whether

分析在美国，休闲时间的增加并没有改变工作和娱乐是两种不同活动的想法．

解答答案：C．
后面的从句work and play are distinct activities中为一主系表结构，不缺少成分，根据句意"工作和娱乐是两种不同活动的想法"可知，从句为the idea的内容，由此判断为同位语从句，that引导同位语从句时不担当任何成分，只起连接作用；故选C．

点评注意同位语从句与定语从句的区别在于引导词that或which在定语从句中充当成分和起连接作用，而同位语从句中引导词that不充当任何成分，只起连接作用；另外，定语从句是对先行词起修饰作用，而同位语从句起解释说明作用，是所修饰名词的内容．

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18．cough（　　）

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As digital media（媒介）is important to its idea，the project is already providing chances for some of the many small new local companies working at the new technologies．
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The digital library will，he says，be as important as the physical one，allowing the distant use of the services，making sure that it is never closed to the public．
Even before the LoB is complete，the public has been able to go online to visit the Virtual（虚拟的）LoB，designed by Baden，the Birmingham virtual worlds specialists．Not only have the public been able to learn about LoB，but the virtual one has also enabled those working on the LoB to understand the building and how it will work before it even opens．
Two other small Birmingham-based digital companies are working on the LoB projects．Substrat，a digital design company，is developing what it calls an"enlarged reality"project．It is about the use of an exciting smart phone，an important part of LoB the which is the early stages of development．And The People's Archive is an online library of figures of the city being built content company in Cahoots，in which users will be encouraged to add to and comment on the material．Gambles says："Technology will enable us to make the library's and services open to citizens as sever before．"

49．The underline part"its idea"in Paragraph 3 refers to the idea ofB
A．the equipment         B．the project  C．the digital media   D．the physical library
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A．get a general idea of the LoB
B．meet more world-famous experts
C．learn how to put up a library building
D．understand how the specialists work on the project
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a．It offers better learning tools
b．It reaches users in different ways
c．It provides users with smart phone
d．It allows users to enrich its material
e．It gives non-stop physical and digital services

A．a，b，d B．a，c，e C．b，c，d D．b，d，e
52．This text more probably fromD．
A．a computer book
B．a library guide
C．a project handbook
D．newspaper report．

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Global warming is having a great effect on hundreds of plant and animal species around the world，changing some living patterns，scientists say．
Increased carbon dioxide（CO2）in the air from burning coal and oil can have an effect on how plants produce oxygen，while higher temperatures and changeable rainfall patterns can change their patterns of growth．
"Predicting species'reaction to climate change is a major challenge in ecology，"said the researches of several U．S．universities．They said plants had been the key object of study because their reaction to climate change could have an effect on food chains and ecosystem services．
The study，published on the Nature website，uses the findings from plant life cycle studies and experiments across four continents and 1，634species．It found that some experiments had underestimated（低估）the speed of flowering by 8.5times and leafing by 4times．
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The design of future experiments may need to be improved to better predict how plants will react to climate change，it said．
Plants are necessary for life on the Earth．They are the base of the food chain，using photosynthesis（光合作用）to produce sugar from carbon dioxide and water．They let out oxygen which is needed by nearly every organism on the planet．
Scientists believe the world's average temperature has risen by about 0.8℃since 1900，and nearly 0.2℃every ten years since 1979．
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A．plants'flowering is 8.5times faster than leafing
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D．the experiments failed to predict how plants react to climate change
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D．It needs to be controlled within 2℃in this century．

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