问题 选择题

可持续发展战略的重要内容之一是保护资源,矿产资源的储量是有限的,而且是不能再生的,下列不符合金属资源保护的有效途径是(  )

A.合理开采矿物资源,回收利用废旧金属

B.寻找、研制金属的代用品

C.有矿物就开采,并加快开采进度

D.对金属制品采用有效的防护措施,防止金属腐蚀

答案

A、合理开采矿物就是要贫矿和富矿都要开采,回收利用废旧金属既减少了金属对环境的污染,又可以节约金属资源,故A正确,

B、用代用品代替钢和其他的合金制管道和汽车外壳,既节约金属,又可以改变车和管道的性能,故B正确,

C、要有计划合理的开采矿物,否则既浪费了资源,又损害了国家利益,故C错误,

D、现在世界上每年因腐蚀而浪费的金属占到了年产量的20%--40%,防止金属腐蚀可以保护金属资源,故D正确.

故选:C.

阅读理解

阅读理解。

     "USA? Britain? Which country is better to study in?" We often hear such discussions. As China opens its

doors, studying abroad has become a dream for many Chinese students. They want to learn about the world.

     It's true that studying abroad can help students develop themselves. Language skills (技能) will improve

and it may be easier to find jobs.

     But there are problems that should be considered (考虑). Language is the first. Students must spend a lot

of time learning another language and getting used to a different culture.

     Students must also learn to live without parents' care and deal with all kinds of things they haven't had to

do before, like looking after themselves. There are reports about Chinese students abroad sinking into an ocean

of difficulties and giving up easily. When they have to take care of themselves, it is hard for students to study

well.

     Finally, studying abroad brings a heavy burden (负担) to the family. For most Chinese parents, the cost

of studying abroad is very high. But is it worth it?

     We know that there are many famous people who succeed in great things through their hard work in

China. Liu Xiang is a good example. Once an American teacher invited him there but he refused. He kept

training hard with his Chinese teacher. He surprised the world when he won a gold medal (金牌) at the Athens

Olympics. So when you wonder which country is better to study in,consider whether studying abroad is the

right choice (选择).

1. From the passage, we learn that many Chinese students dream about studying abroad to ______.

A. taste a new life

B. make a lot of money

C. learn about the world

D. learn to look after themselves

2. The writer thinks ______ should be considered first before students study abroad.

A. places

B. time

C. money

D. language

3. The writer mentions Liu Xiang in the passage in order to tell us that ______.

A. Chinese teachers are better than American ones

B. studying abroad is not the right choice

C. people can also be successful in China if they work hard

D. Liu Xiang was a gold medal winner

4. Which of the following is NOT true?

A. Studying abroad will cost students' families a lot of money.

B. Studying abroad will make it easy for students to learn well.

C. Studying abroad will help students to improve language skills.

D. Studying abroad will bring students a lot of difficulties in their life.

5. This passage is mainly about ______.

A. the question of studying abroad

B. the dream of studying abroad

C. the choice of studying abroad

D. the story of studying abroad

问答题 简答题