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问题 单项选择题 A1型题

受体阻断药的特点是：

A．对受体有亲和力而无效应力

B．对受体无亲和力，有效应力

C．对受体单有亲和力

D．对受体无亲和力，无效应力

E．对受体有亲和力和效应力

答案

参考答案：A

完形填空

A: Who is your favourite singer?                  

B: Li Yuchun.                                              

A:  小题1:_                                                                                        

B: She was born in 1984 in Chengdu, Sichuan.               

A: So she is twenty-seven years old now.                

B:   小题2:

A: Do you know where she studied?

g: Yes. She studied at Sichuan Music College.   小题3:

A: Do you know what her hobbies are?

B: Sure. 小题4:

A: I know many young people like her.小题5:

B: Well, I think that’s because she sings well.
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单项选择题

炉渣向金属中传氧的条件是（）。

A．[O]渣平-[O]实＞0

B．[O]渣平-[O]实＜0

C．[O]渣平-[O]实＝0
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