问题 选择题

下列实验中,仪器之间不允许接触的是(  )

A.将试剂瓶中的液体药品倒入试管

B.用胶头滴管向试管里滴加试剂

C.用漏斗向酒精灯里添加酒精

D.将试剂瓶中的液体药品倒入量筒中量取

答案

A、在倾倒液体时,试管倾斜且试管口与试剂瓶中紧挨在一起.故本选项错误;

B、在使用滴管时,滴管要悬空放置,以防污染滴管.故本选项正确;

C、用量筒来量取液体时,试剂瓶口必须与量筒紧挨在一起.故本选项错误;

D、用漏斗向酒精灯里添加酒精,需要使用漏斗引流,漏斗的颈要紧靠在酒精内壁上.故本选项错误;

故选B.

阅读理解

In the world today, all of the people need recreation (消遣). We cannot work all the time if we are going to keep healthy and enjoy life.

Everyone has his own way of relaxing. Perhaps the most popular form is to take part in sports. There are team sports, such as basketball and football; There are also individual (个人的) sports, such as swimming and running. Skating and mountain climbing are the most popular recreation for people who like to be outdoor.

Not everyone who enjoys sports likes to take part in them. Many people like watching them on TV or listening to them on the radio. So many people like some forms of indoor recreation, such as watching TV, singing and dancing.

It doesn’t matter whether we like indoor recreation or take part in outdoor sports. It is important for everyone to relax from time to time, and enjoy some forms of recreation.

56.Which is the most popular form of recreation?

A.Sports.                             B.Watching TV.          

C.Sleeping.                         D.Singing and dancing.

57.People want to take part in sports in order to ____.

A.keep healthy and enjoy life         B.make friends

C.find a good job                   D.make more money

58.Outdoor sports include ____.

A.watching TV                      B.singing and dancing

C.listening to the radio              D.skating and mountain climbing

59.The passage mainly tells us that ____.

A.basketball is a kind of team sport

B.everyone who enjoys sports should take part in them

C.different people have different ways of relaxing

D.indoor recreation is not as important as outdoor sports

问答题 简答题