问题 选择题

植物组织培养的过程可以归纳为:对此叙述错误的是[ ]

A.②→③的再分化过程中,细胞增殖的方式为有丝分裂

B.植物组织培养依据的原理是细胞的全能性

C.③→④过程指植物的营养生长阶段

D.将①经脱分化培养成②时,再植上人造种皮可获得人工种子

答案

答案:D

阅读理解

阅读理解。

     Tom was from Canada and he had come to New York for a holiday. One day he was not feeling well,

so he asked a man of his hotel to find a doctor. The man said, "Thomas Brown is a good doctor." Tom said,

"Thank you very much. Is he expensive?" "Well" the man answered, "he always asks his patients (病人) for

two dollars if they are first visit. One dollar if they are later visit." Tom decided to save one dollar, so when

he went to see the doctor, he said, "I've come again, doctor." For a few minutes the doctor looked at his

face carefully without saying anything. Then he said, "Everything's going as it should do. Oh, I gave you

medicine last time, didn't I? Just go on with it."

1. Tom came to New York ______.

A. to see a good doctor

B. for a holiday

C. to feel ill

D. to find a doctor

2. Doctor Thomas Brown asked for ______ for the first time.

A. one dollar

B. two dollars

C. nothing

D. three dollars

3. The doctor looked at Tom's face carefully because ______.

A. he knew Tom

B. he had seen Tom before

C. there was something wrong with his face

D. he wanted to know if Tom had been here before

4. Tom said,"I've come again, doctor." Because he ______.

 A.wanted to be friendly to the doctor

B.wanted to make the doctor happy

C.wanted to make the doctor angry

D.tried to make the doctor believe that he had been to him before

5. The doctor knew that ______.

A. Tom didn't want any medicine

B. he hadn't seen Tom before

C. he had given Tom some medicine before

D. Tom wasn't feeling ill

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