红外线的波长范围为（）。A、0.40～0.0045μm B、0.40～0.76μm C、

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问题单项选择题

红外线的波长范围为（）。

A、0.40～0.0045μm

B、0.40～0.76μm

C、0.76～1000μm

D、1～300mm

答案

参考答案：C

单项选择题

Many students agreed to come, but some students against because they said they don't have time.

A．were against because they said they did not

B．were against because they say they don't

C．were against it because they said they did not

D．were against coming because they said they don't

问答题简答题

中道义有真实之相吗？