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问题 单项选择题

由少数几家企业控制的市场结构是( )。

A．寡头垄断

B．完全垄断

C．完全竞争

D．垄断竞争

答案

参考答案：A

解析： B项完全垄断是指本行业只有一家企业；CD两项是指企业数目很多的市场。

阅读理解

阅读大观园，快乐选一选。

     I'm Jenny. I live in Canada. Dumplings and vegetables are my favorite food.

They're delicious. But I don't like noodles or chicken. I have milk and bread for

breakfast in the morning. Then I go to school. I have lunch at school. I go home

at 5: 00. I do my homework in the evening.

1. I like _____ a lot.

A. milk      

B. bread     

C. dumplings      

D. chicken

2. I have _____  for breakfast.

A. chicken    

B. noodles    

C. milk and noodles        

D. bread and milk

3. I eat _____  at home.

A. lunch  

B. breakfast and supper  

C. breakfast and lunch  

D. lunch and supper

4. I don't like _____  .

A. chicken        

B. vegetables         

C. bread            

D. fruit

5. I go home at _____  .

A. 4: 00          

B. 5: 00          

C. 6: 00            

D. 7: 00
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单项选择题

在厕所洗手池的下面，有一个水加热器；在水完全放空时，热水器可以在多长时间内加热其容纳的新罐充的全部冷水（）？

A、1分钟

B、2分钟

C、3分钟

D、4分钟
查看答案