问题 实验题

(1)学习化学可以帮助我们解决许多生活中的问题。房屋失火常用水来扑灭,实验室熄灭酒精灯则用灯帽将其盖灭。请你根据上述两种灭火的原理,另各举一种生活中常用的灭火方法①__________________;②__________________________。

(2)请结合下图回答问题:

①写出图中标号的仪器名称:a_____________; b _____________

②通过查阅资料得知:氨气(NH3)是一种密度比空气小且极易溶于水的气体,其水溶液称为氨水。小芳同学加热氯化铵和氢氧化钙的固体混合物制取氨气,应选择的反应的发生装置是____________,收集装置是____________(填字母编号) 。

③小芳将收集满氨气的集气瓶倒扣在水中,观察到的现象 ______________________。

答案

(1)①篝火晚会结束时,用水将火熄灭

②用盖子盖灭油锅着火等(合理即可)

(2)①分液漏斗、试管

②B、E

③集气瓶内液面上升

阅读理解

An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they had no money. Only a very expensive operation(手术) could save him now and there was no one to lend them the money.

  When she heard her daddy say to her tearful mother, “Only a miracle(something couldn’t happen) can save him now,” the little girl went to her bedroom and pulled her money from its hiding place and counted it carefully.

  She hurried to a drugstore(药店)with the money in her hand.

  “And what do you want?” asked the salesman. “ It's for my little brother,” the girl answered. “He's really,really sick and I want to buy a miracle. ”

  "Pardon?”said the salesman.

  “My brother Andrew has something bad growing in-side his head and my daddy says only a miracle can save him. So how much does a miracle cost?”“We don't sell a miracle here,child. I'm sorry,”the salesman said with a smile.

  “Listen,if it isn't enough,I can try and get some more. Just tell me how much it costs. ”

  A well-dressed man heard it and asked, “What kind of a miracle does your brother need?”  “I don't know,” she answered with her eyes full of tears. “He's really sick and mum says he needs an operation. But my daddy can't pay for it, so I have brought all my money. ”

  “How much do you have?” asked the man. “$ 1.11, but I can try and get some more,” she answered.

  “Well, what luck,”smiled the man. “$ 1.11, the price of a miracle for little brothers. ”

  He took up the girl's hand and said, “Take me to where you live. I want to see your brother and meet your parents. Let's see if I have the kind of miracle you need. ”

That well-dressed man was Dr. Carlton Armstrong, a famous doctor. The operation was successful and it wasn't long before Andrew was home again.

  How much did the miracle cost?

小题1:What was the trouble in the little girl's family?

A. Her brother was seriously ill.

B. They had no money.

C. Nothing could save her brother.

D. Both A and B.

小题2:In the eye of the little girl,a miracle might be _______.

A.something interesting

B.something beautiful

C.some wonderful medicine

D.some good food小题3:What made the miracle happen?

A.The girl's love for her brother.

B.The girl's money.

C.The medicine from the drugstore.

D.Nobody can tell.小题4:From the passage we can infer(推断) that _______.

A.The doctor didn't ask for any pay

B.A miracle is sure to happen if you keep on

C.The little girl is lovely but not so clever

D.Andrew was in fact not so sick as they had thought

单项选择题