问题 名词解释

毒素

答案

参考答案:

由病原物所产生的、并能在低浓度下对植物细胞产生损伤作用的低分子化合物。病原菌毒素在化学结构上主要为寡肽,其次为萜烯类、酰胺、羧酸等;少数为糖肽。

阅读理解

阅读理解。

     Let's play a guessing game. He's a young man.  He is an actor and he is very popular. He is from

Liaoning province. He has short black hair and small eyes. He is of medium build. He can sing many

songs well and his voice is beautiful. He can dance well, too. He always has new looks. And people like

his new looks. He is in the Tongzhuodeni in 2011 Spring Festival Gala (2011春节联欢晚会).  He is

one of the disciples(徒弟) of Zhao Benshan. Do you know who he is?

1. The man is ______.    

          A                   B                     C                          D

2. What does he look like?        

A. He has short black hair and small eyes and he is of medium build.       

B. He has long black hair and small eyes and he is of medium build.       

C. He has short black hair and big eyes and he is of medium build.       

D. He has short black hair and small eyes and he is tall.

3. Can he sing well?       

A. Yes, he can.        

B. He can sing many songs well.        

C. No, he can't.        

D. We don't know.

4. Do people like his new looks?        

A. No, they don't.        

B. People don't like his new looks.        

C. Yes, they do.        

D. People don't like his old looks.

5. He is one of Zhao Benshan's ______.       

A. brothers                  

B. friends      

C. sons                    

D. disciples

单项选择题