问题 实验题

一氧化碳还原氧化铁的装置图如下,(B中盛有澄清的石灰水).回答问题.

(1)写出带有标号的仪器的名称 _________

(2)写出A、B中发生反应的化学方程式 _________ _________

(3)装置B的连接如下图:

在连接c和d时,使d较易插入c中的措施是 _________ ;采用图2所示操作可能造成的后果之一是 _________

(4)C装置的作用是 _________

答案

(1)酒精灯;

(2)3CO+Fe2O32Fe+3CO2;Ca(OH)2+CO2==CaCO3↓+H2O;

(3)用水湿润导管;试管底被压碎;

(4)点燃尾气,防止污染空气

阅读理解

Few Americans remain in one position or one place for a lifetime. We move from town to city to suburb, from high school to college in a different state, from a job in one region to a better job elsewhere, from the home where we raise our children to the home where we plan to live in retirement. With each move we are forever making new friends, who become part of our new life at that time.

For many of us summer is a special time for forming new friendships. Today millions of Americans vacation abroad, and they go not only to see new sights but also with the hope of meeting new people. No one really expects a vacation trip to produce a close friend, but the beginning of a friendship is possible.

The word “friend ” can be applied to a wide range of relationships ---- to someone one has known for a few weeks in a new place, to a fellow worker, to a childhood playmate, to a man or woman, to a trusted confidant.

小题1:Many Americans move from place to place for the following reasons except______.

A.going to college

B.getting a better job

C.finding a place to live in retirement

D.saving money小题2:Summer is a special time when many Americans_____.

A.enjoy the sunlight

B.feel strange

C.travel to other countries

D.get a new job小题3:When summer comes, many Americans _________.

A.hope to meet new people

B.expect to find some close friends

C.want to begin lasting friendships with new people

D.Both A and B小题4:From the passage it can be seen that a “friend” can be ______.

A.a fellow worker

B.a football teammate

C.a boy or a girl

D.all of the above小题5:Which of the following is the topic sentence of the second paragraph?

A.For many of us summer is a special time for forming new friendships.

B.Today millions of Americans vacation abroad.

C.No one really expects a vacation trip to produce a close friendship.

D.But surely the beginning of friendship is possible.

单项选择题