问题 选择题

制作临时装片时,所用的材料应该是(  )

A.厚而透明

B.厚而不透明

C.薄而透明

D.薄而不透明

答案

显微镜成像是利用光学原理,必须是可见光线穿过被观察的物体,如果不透光就不能成像,因此显微镜的材料必须是薄而透明的.

故选C

阅读理解

阅读理解。

     The 14-year-old Zhang Lei was riding home when a man suddenly jumped out from the roadside,

pulled him off his bike and rode to run off. Zhang was fairly scared, but he didn't run after the robber.

Instead, he found a telephone quickly and called the police at 110.    

     "Safety is the most important in such a situation, "Zhang said, remembering what his teacher had

told him in his first-aid class (急救课). "An adult is much stronger than you. It is not safe to run after

an adult."  

     Zhang is a student at Shenzhen Bao' an Middle School in Guangdong. His school is the first in China

to have first-aid education. The students at the school must take the class once a week.    

     Teenage safety has become a serious problem recently. According to a 2009 survey, about 16,000

teenagers die in all kinds of accident in China every year.

       Bao' an School said that the first-aid classes are to teach students skills so that they can save

themselves in unusual situations.    

Sun Yan, 12, described her favorite first-aid lesson."I performed as a stranger knocking at a door. A

classmate stood inside the door and asked several questions before letting me in. Then we changed roles

and did it again. "Sun said,"We learned a lot while having fun at role-playing."    

      "The teacher told us not to go out alone, especially at night. We would hit their eyes or noses if

someone tried to do bad things to us. Then  we should quickly run into a crowded place," said Wang

Ying, a 13-year-old girl.    

1. 判断正误(“T”表示正确,“F”表示错误)。

    ( )  It is not safe to run after an adult who is stronger than you. 

2. What happened to Zhang Lei that day?   

    ____________________________________________                                                                    

3 .Where should we run if we met a bad person?

    ____________________________________________   

4.  将文中画线句子译成汉语。

    ____________________________________________

5. What's the best title of the article? 

    ____________________________________________

问答题 简答题