问题 单项选择题

所谓的颜色,其实不过是某些波长的电磁波被我们的眼睛捕捉后所产生的反应。虽然所有温度高于绝对零度以上的物体都会放出电磁波,但是其中只有极少数特定波长的电磁波才能引起人类的光感。在太阳辐射而来的电磁波中,除了可见光之外,还有一些我们看不到的红外线和紫外线,如果将所有可见光都过滤出去,即使剩余的电磁波强度再高,我们也只能看到一片漆黑。
关于这段文字,以下说法正确的是______。

A.存在可见光是人眼感知颜色的基础
B.眼睛捕捉电磁波后所产生的反应就是光感
C.物体温度越高,释放的电磁波越强
D.可见光的强度越强,眼睛所看到的颜色越鲜艳

答案

参考答案:A

解析: 由“如果将所有可见光都过滤出去,即使剩余的电磁波强度再高,我们也只能看到一片漆黑”可知,存在可见光是人眼感知颜色的基础。B项偷换概念,C、D两项无中生有。故选A。

听力题

请根据首字母及汉语提示完成下列句子,每空只填一个单词。

小题1:We hope we can reach the market through different c____________( 渠道).

小题2:The police said that the shooting was an isolated i_________ (事件 )

小题3:If you want to see Dr Lee, you have to make an a__________(预约)first.

小题4:For the past 30 years, e________ (经济) growth in China has lifted millions of people out of poverty

小题5:Alexander Hamilton f_______ (坚定地) believed that no country could become a modern nation without industry

小题6:As we all know, Canada, like the USA and Australia, is a m____________ (多文化的 ) country.

小题7:It often strikes adults, leaving them u    (不能)to work.

小题8:President Abraham Lincoln wrote the address at the White House , p______ (润色) it at this home in Gettysburg,and then delivered it at a battlefield in Gettysburg.

小题9:Now, as wages rise, Chinese citizens are i_________ (越来越,更加) worried about the environment and pollution.

小题10:Effective treatments do exist, but u_________ (不幸地) they are very expensive.

小题11:As teenagers, we should all learn to be i___________ (独立)。

小题12:Hundreds of thousands of children become i______ (感染) with the AIDS virus every year.

小题13:Two amphibious ships, the U.S.S.Germantown and U.S.S. Ashland, can deliver tons of s_______ (必需品,物质), personnel, and equipment to remote beaches in otherwise unreachable areas.

小题14:The researchers found that people driving pricey cars were less likely to stop for people trying to walk across the street and were more likely to i_____ (忽视) traffic laws.

小题15:When students are first starting out as future physicians, they learn that it's important to e_____(建立)a relationship with their patients and to be able to communicate effectively.

单项选择题