试题与答案

将铁粉和铜粉混合物7.0g,加入到盛有60.0g稀盐酸的烧杯中,恰好完全反应.此

题型:问答题

题目:

将铁粉和铜粉混合物7.0g,加入到盛有60.0g稀盐酸的烧杯中,恰好完全反应.此时烧杯内各物质的总质量为66.8g.试计算:

(1)原混合物中铁粉的质量分数.(精确到0.1%)

(2)反应后所得溶液中溶质的质量分数.(精确到0.1%)

答案:

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题型:阅读理解

阅读理解.

     The clock struck eleven at night. The whole house was quiet. Everyone was in bed

except me. Under the strong light, I looked sadly before me at a huge pile of that troublesome

stuff they call "books".

     I was going to have my examination the next day. "When can I go to bed?" I asked 

     The clock struck twelve. "Oh, dear!" I cried. "Ten more books to read before I can

go to bed!" We pupils are the most wretched creatures in the world. Dad does not agree

with me on this. He did not have to work so hard when he was a boy.

     The clock struck one. I was quite desperate now. I forgot all I had learned. I was too

tired to go on. I did the only thing I could. I prayed, "Oh God, please help me pass the

exam tomorrow. I do promise to work hard afterwards, Amen." My eyes were so heavy

that I could hardly open them. A few minutes later, with my head on the desk, I fell asleep.

1. The underlined word "wretched" in Paragraph 3 probably means _______.

A. happy

B. disappointed

C. unhappy

D. hopeful

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A. it was too late at nightB. he was very tired

C. his eyelids were so heavy that he couldn't keep them open

D. he hadn't studied hard before the examination

3. What do you suppose probably happened to the author the next day______.

A. He went to a church to pray again.

B. He passed the exam all by luck.

C. He failed in the exam.

D. He was punished by his teacher.

4. The best title for the passage would be ______.

A. The Night Before the Examination

B. Working Far into the Night

C. A Slow Student

D. Going Over My Lessons

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