问题 选择题

“厨房化学”是指利用家庭生活用品进行化学实验,从而对化学进行学习和探究的活动。下列实验在“厨房化学”中不能完成的是 [ ]

①检验自来水是否含氯离子 ②鉴别食盐和小苏打 ③蛋壳能否溶于酸 

④白酒中是否含甲醇 ⑤检验食盐中不含碘单质 ⑥蛋白质在加热条件下是否变性

A.①④⑤

B.②③⑤⑥

C.①④

D.②④

答案

答案:C

阅读理解

根据短文内容,选择最佳答案。

     One day an Indian went to his doctor. The doctor looked him over and said, "Medicine ( 药)won't

  help you. You must have a good rest. Go to a quiet place for a month, go to bed early, drink milk, walk

  a lot, and smoke( 吸) only one cigar ( 烟) a day. "

     A month later the Indian came to see the doctor again.  "How are you?"said the doctor, "I'm glad to

 see you again. You look much younger. " "Oh, doctor, I feel quite well now!"said the Indian.  "I had a

  good rest. I went to bed early, I drank a lot of milk. I walked a lot . You certainly helped me. But you

 told me to smoke one cigar a day, and that one cigar a day almost killed (杀死) me at first. It was no joke

  to begin smoking at my age. "

1. One day an Indian _____.

    A. wasn't feeling well    

    B. went to see a friend    

    C. felt very tired  

    D. went to his doctor and helped him

2. His doctor _____.

    A. could not help him  

    B. was good to him    

    C. told him what to do  

    D.  was glad to see him

3. When the Indian came to see the doctor again _____.

    A. the Indian was younger    

    B. the doctor was not free    

    C. the Indian  felt quite well    

    D. the doctor looked him over

4. The Indian told the doctor _____.

    A. he liked doing all those things    

    B. he almost killed him    

    C. to smoke one cigar a day  

    D. one cigar a day was very difficult at the beginning

5. From this story we can guess _____.

    A. the Indian was not a young man    

    B. the doctor was very interesting   

    C. the doctor was a good one    

    D. the Indian didn't smoke at first

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