问题 选择题

实验室制取二氧化碳,大致分为以下几步:a检查装置的气密性;b连接装置;c装石灰石,用带导管的单孔塞塞紧后,固定在铁架台上;d收集二氧化碳; e加稀盐酸;f验满.实验操作顺序正确的是(  )

A.bacedf

B.abcdef

C.bcadfe

D.abcdfe

答案

实验室制取二氧化碳的基本步骤包括:连接好仪器-检查装置的气密性-装药品(先固体后液体)-收集气体-验满,故答案选A.

阅读理解

阅读理解。

     A man was tired of living in his old house in the country and wanted to sell it and buy a better one. He tried

to sell it for a long time, but was not successful, so at last he decided to solve the problem by using a real estate

agent. (房地产) The agent decided at once to advertise the house, and a few days later, the owner saw a very

attractive photograph of it, with a wonderful description of its gardens, in an expensive magazine. After the

house owner had read the advertisement through, he hurriedly telephoned the real estate agent and said to him,

"I'm sorry, Mr. Jones, but I've decided not to sell my house after all. After reading your advertisement in that

magazine, I can see that it's just the kind of house I've wanted to live in all my life."

1. What problem did the man have? [ ]

A. He couldn't find his house.

B. He was unsuccessful at selling his house.

C. He was unsuccessful at buying a house.

D. He was unsuccessful at finding a real estate agent.

2. It's easier to sell house through agents because _____. [ ]

A. they have a magazine

B. they are better at writing articles

C. they are good at better advertising

D. they are better looking

3. Which of the following best states the main idea? [ ]

A. You don't know what you have until you have lost it.

B. It's hard to sell a house.

C. No one likes to live in the country.

D. There is no place like home.

4. In the passage the word "attractive" most nearly means _____. [ ]

A. perfect

B. complete

C. modern

D. pleasant to look at

填空题