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问题 单项选择题

原子荧光与原子吸收光谱仪结构上的主要区别在（）

A、光源

B、光路

C、单色器

D、原子化器

答案

参考答案：B

选择题
He explained to the class what he suggested ____ his idea ____.

A. to make; accepted
B. making; agreed to
C. should make; receive
D. make; passed
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选择题

—Will you attend the meeting this afternoon?

　　　　—But I ________ told anything about it.

A．wasn't

B．am not

C．haven't been

D．won’t be
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