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问题 单项选择题

细菌菌落由光滑型变为粗糙型是因为细胞壁中哪种成分缺失

A．脂质A

B．核心多糖

C．磷壁酸

D．特异多糖

E．脂蛋白

答案

参考答案：D

解析： 特异多糖是在脂多糖的最外层由数个至数十个低聚糖重复单位构成的多糖链。

阅读理解

阅读理解。

     A poor man has an apple tree in his garden. There are many nice apples on it. He finds one

of the apples much bigger than the others. It is as big as a ball. The poor man takes the apple to

the king. The king is so happy that he gives him a lot of money. A rich man hears of this; he

takes his gold cup to the king. He hopes to get much more money from the king.

    The king likes the cup very much. He says,"This cup is very nice. I'm going to show you

something nicer; please take this apple."

     The rich man is very angry and throws the apple away.

1.  The poor man ____.  

A. grows an apple tree    

B. can make money

C. makes cups          

D. sells fruit

2. The king ____ the apple. 

A. doesn't like    

B. likes    

C. wants to buy    

D. wants to sell

3. The rich man wants to get ____ from the king.

A. the apple    

B. the tree    

C. more money    

D. the gold cup

4. The king gives the rich man ____.    

A. much money  

B. the cup    

C. the garden    

D. the apple

5. The rich man____the apple.   

A. wants to sell    

B. wants to eat    

C. likes    

D. throws away
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不定项选择

三大诉讼证明的差异有（）o

A．证明责任的分配不同 

B．证据的种类有所不同 

C．证明标准不同 

D．证明对象不同
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