题目内容

【题目】下图是“南水北调中线干线工程路线示意图”,在输水工程中,输水道采用明渠和暗渠两种方式,明渠输水采用与沿线河流立交方式,不与地表水发生水体交换,暗渠则采用地下涵管输水方式。完成下面小题。

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1在南水北调中线工程中,明渠、暗渠输水道如此设计主要目的是( )

A. 避免水分蒸发B. 节约耕地资源

C. 确保水质良好D. 保障水量供应

2图中黄河以北部分地区将生产冬小麦的土地季节性休耕,种植雨热同季的春玉米。该做法可以( )

A. 提高太阳辐射利用率B. 缓解地下水紧张状况

C. 增强农作物抗旱能力D. 改善土壤肥力和性状

【答案】

1C

2B

【解析】

1本题主要考查明渠、暗渠输水道的主要目的。读图分析可知,南水北调的线路较长沿线所经地区经济发达,排污量较大,因此为了保护水质,采用名曲和暗渠方式,故选C。

2黄河以北属于温带季风气候,雨热同期,年降水量较小,冬小麦在春季处于返青季节,需水量较大,引水灌溉会导致地下水位下降,从而产生地下漏斗等问题,因此种植雨热同季的春玉米,可以减少在旱季时水资源的用量,减少地下水紧张状况,B正确。故选B。

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【题目】(E)

The World Wide Webwww.万维网)turned 25 years old on March 12th. It has become a very important part in our daily lives. We can’t imagine living without the web, the short form of the World Wide Web.

In 1989, a British engineer named Tim Berners-Lee came up with the idea of the Web. It is a group of “pages” of information that are connected to each other around the world. That is the very beginning of the Web. Since then, the Web has greatly changed the way people live. With a click(点击)of a mouse we can read news, buy things, make friends and learn anything we’re interested in.

Now, 25 years after its birth, how will the Web influence life in the future? Scientists believe there are both advantages and disadvantages. w W w .x K b 1.c o M

A growing Web will help build “better relationships” between different cultures. Also in the future, everyday items could be connected to the Web. We could share plenty of information to make our daily lives more convenient(方便的). So one day in the future, your front door could send you a message. “Dear sir, everyone has left the house, but I’ m still open!”

But scientists warn(警告)us that if we share personal information on the Internet it could get into the wrong hands.

“It’s not wise to spend a whole day in front of the screen. People need to get close to nature and enjoy the sun. Never be controlled by the Internet.” said Berners-Lee.

1How old is the World Wide Web?

2Who came up with the idea of the Web?

3What can we do by clicking a mouse according to the passage?

4Will the Web influence life in the future?

5What could happen if we share personal information on the Internet?

【题目】 Learning about the environment is very important. There are many good books that will help you learn. To get started, ask your teacher or a librarian for some suggestions. You can also look at some good websites with information about the environment and climate change. Climate change may be a big problem, but there are many little things we can do to make a difference.

Driving a car or using electricity is not wrong. We just have to be smart about it. Some people use less energy by carpooling . For example, four people can ride together in one car instead of driving four cars to work. Whenever we use electricity, we put greenhouse gases (气体)into the air. By turning off lights, the television, and the computer when they aren't needed, you can help a lot.

Don't buy products that use too much energy. Some products, like certain cars, are made specially to save energy. These cars can travel longer on a smaller amount of gasoline. They don't pollute as much, either. Products like computers, TVs, and VCRs with the ENERGY STAR label (标签) are made to save energy. Buying products with these labels will help protect the environment. Buy recyclable products instead of non-recyclable ones. Recyclable products are usually made out of things that have already been used. It usually takes less energy to make recyclable products than to make new ones. So when you go shopping, look for the recycle mark on the package-three arrows that make a circle. The less energy we use, the better.

1The passage is mainly written for .

A. car producersB. school studentsC. parents

2The underlined word “carpooling” in Paragraph 2 most probably means .

A. sharing a carB. pulling a car C. selling a car

3From the passage, we can learn that .

A. turning off the electricity when it isn't needed can save a lot of energy

B. electricity will cause great trouble to our environment

C. cars using less energy will not put greenhouse gases into the air

4If you use recyclable products instead of new ones, you can spend .

A. more moneyB. less energyC. more energy

5Which of the following can be the writer's opinion?

A. No pains, no gains.

B. Rome was not built in one day.

C. Little things can make a big difference.

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