问题 选择题

人类社会的发展离不开能源,能源革命促进了人类文明的进步.下列关于能源利用的说法中正确的是(  )

A.人类大量使用太阳能会导致温室效应

B.因为能量是守恒的,所以不存在能源危机

C.煤、石油、天然气的化学能归根到底来自太阳能

D.核能的使用会造成放射性污染,所以不应该开发核能

答案

A、人类大量使用太阳能不会放出二氧化碳,不会导致温室效应,所以A是错误的;

B、虽然能量是守恒的,但能量的转化具有方向性,且并不是所有的能量都可以使用,所以能源危机依然是存在的,B是错误的;

C、煤、石油、天然气的能量都是间接的来自于太阳能的,所以C是正确的;

D、核能虽然会带来一定程度的污染,但同时可以带来更大的经济效应,所以还是应该开发的,D是错误的.

故选C.

阅读理解

阅读理解。

     American schoolchildren often wear uniforms if they attend religious or other private schools. Most public schools do not require uniforms. But over the last ten years or so, more of them have moved in that direction, including high schools. Another option is that students may just have to dress alike - for example, white shirts and dark colored pants or skirts. Even schools that do not require uniforms generally have a dress rule about what they consider acceptable. Schools commonly forbid clothing that shows images or words causing displeasure, or simply too much skin. Hats may be forbidden because, for example, different colors may be connected with bad guys.

     Some parents like the idea of uniforms. Some say it means they do not have to spend much on clothing for their kids. Others, though, argue that uniforms represent an unnecessary cost.

     There are also debates about whether uniforms or other dress rules go against civil rights. Students and parents have taken legal action against school dress requirements. At the beginning of this July, a middle school was asked to stop its dress rule unless families have a way out of it. The American Civil Liberties Union of Northern California brought the case for the families of several students who had been punished by the school. Most attention centered on a girl who wore socks with the Tigger character from Winnie the Pooh. The school said its clothing rules, including no pictures of any kind, were needed to control a growing problem with gangs. The families argued that the policy went against free speech rights as protected by the United States and California constitutions (宪法).

     The United States Supreme Court says student expression is protected as long as it does not harm the work and the rule of a school. But some educators believe dressing alike helps improve student learning. They believe that uniforms help create a sense of unity and reduce the risk of fights. They also say uniforms make it easier for security reasons to tell if someone belongs to the school or not.

1. According to the passage there is a trend(趋势) in the USA that ______.

A. most public schools do not require uniforms

B. most public schools move in the direction of requiring uniforms at church

C. most schools require the students to be dressed in white shirts and dark colored pants

D. more and more schools have a dress rule about what are suitable for schoolchildren

2.Which of the following is NOT a reaction mentioned to the dress rule?

A. Some parents like the rule which means they could spend less on clothing for the kids.

B. Some parents think the rule has nothing to do with them.

C. Some parents say that uniforms are an extra cost for them.

D. Some others argue that uniforms or other dress rules go against civil rights.

3. What is the girl's problem?

A. She brought her pet called Tigger to school.

B. She put Tigger into her shoes in class.

C. She wore socks with pictures.

D. She had a problem with some gangs.

4. School dress requirements can benefit schools and students except to help ______.

A. the court protect student expression

B. students focus on their studies

C. make a united effort to avoid fights

D. strengthen campus security

单项选择题