问题 填空题

光学显微镜是由两组镜片构成,每组镜片相当于一个 _________ ,物镜的焦距很 _________ ,目镜的焦距较 _________ .光学显微镜的放大倍数等于物镜和目镜放大倍数的 _________

答案

凸透镜,短,长,乘积.

阅读理解

What is your favorite color? Do you like yellow, orange, or red? If you do, you must be an active person who enjoys life. Do you like blue? Then you are probably quiet, shy, and would rather follow than lead.

Colors do influence our moods (情绪). A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress brings warmth and cheer to the saddest winter day. On the other hand, black is depressing(令人压抑的). There was a black bridge over the Thames River, near London. The number of people who killed themselves on that bridge used to be larger than on any other bridge in the area -- until it was repainted green.

Light and bright colors make people not only happier but also more active. In the factory, the workers will work better, harder, and have fewer accidents when their machines are painted orange rather than black.

小题1:An active person may like ____   

A.yellow, orange, or red

B.yellow, black, or red

C.orange, blue, or black

D.black, red, or orange小题2:Most people feel more __ in a yellow room than in a dark green one.

A.tired

B.bored

C.worried

D.relaxed小题3:More people killed themselves on the black bridge than on any other bridge probably because ____

A.the bridge was very tall

B.the bridge was too crowded

C.people didn't like the bridge

D.the color of the bridge was depressing小题4:In the factory, when the machines are painted orange, the workers will work __

A.worse

B.harder

C.more slowly

D.more angrily

单项选择题