问题 选择题

矿工被困井下,下列物质中对其维持生命很重要,但又不能提供能量的是

A.水

B.糖类

C.脂肪

D.蛋白质

答案

答案:A

题目分析:其中蛋白质是构成人体细胞的基本物质,人体的生长发育、组织的更新等都离不开蛋白质.糖类是人体最重要的供能物质,人体的一切活动,包括学习、走路、消化和呼吸等所消耗的能量主要来自糖类.脂肪是人体内备用的能源物质,一般储存在皮下备用.水、无机盐、维生素不能为人体提供能量,水是细胞的主要成分之一,约占体重60%~70%,对其维持生命很重要,营养物质和废物必须溶解在水中才能被运输.由上可知,矿工被困井下,对其维持生命很重要,但又不能提供能量的物质是水.

选择题
阅读理解

When Paul was a boy growing up in Utah, he happened to live near a copper smelter(炼铜厂),and the chemicals that poured out had made a wasteland out of what used to be a beautiful forest.One day a young visitor looked at this wasteland and called it an awful area.Paul knocked him down.From then on, something happened inside him.

Years later Paul was back in the area, and he went to the smelter office.He asked if they had any plans or if they would let him try to bring the trees back.The answer from that big industry was “No”.

Paul then went to college to study the science of plants.Unfortunately, his teachers said there weren’t any birds or squirrels to spread the seeds.It would be a waste of his life to try to do it.Everyone knew that, he was told.Even if he was knowledgeable as he had expected, he wouldn’t get his idea accepted.

Paul later got married and had some kids.But his dream would not die.And then one night he did what he could with what he had.As Samuel Johnson wrote, “It is common to overlook what is near by keeping the eye fixed on something remote.Attainable good is often ignored by minds busied in wide ranges.” Under the cover of darkness, he went secretly into the wasteland and started planting.

And every week, he made his secret journey into the wasteland and planted trees and grass.For fifteen years he did this against the plain common sense.Slowly rabbits appeared.Later, as there was legal pressure to clean up the environment, the company actually hired Paul to do what he was already doing.

Now the place is fourteen thousand acres of trees and grass and bushes, and Paul has received almost every environmental award Utah has.It took him until his hair turned white, but he managed to keep that impossible vow he made to himself as a child.

小题1:When Paul was a boy,______________.

A.he had decided never to leave his hometown

B.the economy of Utah depended wholly on the copper smelter

C.no laws were made to protect the environment against pollution

D.he had determined to stop the copper smelter polluting the area小题2:Why did Paul go to college to study the science of plants?

A.Because he wanted to find out the best way to save the area himself.

B.Because he was interested in planting trees since he was young.

C.Because he wanted to get more knowledgeable people to help him.

D.Because he thought his knowledge would make his advice more persuasive.小题3:What does the underlined phrase “the plain common sense” probably refer to?

A.That it was impossible for trees to grow on the wasteland.

B.That his normal work and life would be greatly affected.

C.That no one would like to join him in the efforts.

D.That he had to keep everything he did secret.小题4:The company hired Paul to plant trees and grass because___________.

A.they realized the importance of environmental protection

B.What Paul was doing moved them

C.Paul persuaded them to help him

D.they had legal pressure小题5:The message of the passage is that _____________.

A.action speaks louder than words

B.perseverance(持之以恒)will work wonders

C.God helps those who help themselves

D.many hands make light work