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问题 单项选择题

为保证掘进工作面回风流甲烷传感器能正确反映掘进工作面回风流中的瓦斯含量，回风流甲烷传感器应设置在距掘进巷道回风口小于等于（）米的范围内。

A.10

B.15

C.20

答案

参考答案：B

阅读理解

阅读短文，然后答题。

     Look at this. What's this in English, do you know? Ah, it's a photo. Who's that in the photo? It's Li

Yan. Li Yan is my good friend. She is a beautiful girl. Who's that? The boy in black? It's Jim. He is an

English boy. He is very cool. He is my friend, too. We are all in the same school. I like Jim and Li Yan. 

根据短文内容选择正确答案。

1. What is t his? It's ______.

A. a school    

B. a friend      

C. a photo      

D. an English friend

2. Li Yan is ______.

A. a good boy                  

B. a cool boy        

C. a beautiful girl                

D. an English girl

3. What color is Jim in? ______.

A. Red        

B. Yellow      

C. Orange      

D. Black

4. Who's English? ______.

A. I          

B. Jim          

C. Li Yan      

D. Jim and Li Yan

5. Who are in the same school? ______.

A. Jim and Li Yan                

B. Jim and I          

C. Li Yan and I                  

D. Jim, Li Yah and I
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单项选择题

伤寒宜选

A．四环素

B．多西环素

C．氯霉素

D．氨苄西林

E．白霉素
查看答案