问题 选择题

操作显微镜时,完成下列哪个动作时眼睛一定要看着物镜?

A.对光

B.观察物像

C.上升镜筒

D.下降镜筒

答案

答案:D

题目分析:显微镜的使用方法的用眼方法主要有以下两种:在对光和观察时应左眼注视目镜,右眼睁开,以备绘图;在操作显微镜下降镜筒时,眼睛一定要看着目镜,避免物镜压坏玻片标本,所以观察前,操作显微镜下降镜筒时,眼睛一定要看着物镜。

点评:此题是一道实验操作题,考查的是显微镜的使用方法中的用眼方法,熟练操作显微镜,即可解题。

阅读理解

Once there was a piano player in a bar(酒吧). People came just to hear him play. But one night, a lady asked him to sing a song.

"I don't sing," said the man.

But the lady told the waiter, "I'm tired of listening to the piano. I want the player to sing!"

The waiter shouted across the room, "Hey, friend! If you want to get paid, sing a song!"

So he did. He had never sung in public before. Now he was singing for the very first time! Nobody had ever heard the song Mona Lisa sung so beautifully!

He had talent(天赋) he was sitting on! He may have lived the rest of his life as a no-name piano player in a no-name bar. But once he found, by accident, that he could sing well, he went on working hard and became one of the best-known singers in the US. His name was Nat King Cole.

You, too, have skills and abilities. You may not feel that your talent is great, but it may be better than you think. With hard work, most skills can be improved. Besides, you may have no success at all if you just sit on your talent.

小题1:The lady asked the player to sing a song because _____.

A.she had paid him for this

B.she knew him very well

C.she wanted to have a change

D.she enjoyed his singing小题2:Nat King Cole succeeded because _____.

A.the lady helped him a lot

B.he caught the chance

C.he continued to play in the bar

D.he stopped playing the piano小题3:The words "sit on" in the passage probably mean" ___________.”

A.fail to realize

B.forget to use

C.try to develop

D.manage to show小题4:From the story we know if you have some talent, you should _____.

A.hide it and wait

B.ask others for help

C.pay no attention to it

D.work hard to improve yourself小题5:Which could be the best title (标题) for the passage?

A.Sing in the Bar

B.Achieve Success in Life

C.Never Lose Heart

D.Find Your Hidden Talent

单项选择题