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问题 多项选择题

放射性辐射污染的主要来源有（）等。

A.宇宙线

B.紫外光污染

C.地球上的天然放射性源

D.人类活动增加的辐射

E.医疗照射引起的放射性

答案

参考答案：A, C, D, E

选择题

— She's really pretty, isn't she? Her skin looks so baby smooth!    

— Well, it's just that she puts lots of make-up on her face. _______ . [      ]

A. Sometimes I wish I could be as beautiful

B. Actually, natural beauty comes from inside

C. I can believe she is still so pretty after giving birth to a baby!

D. Fortunately, she has a good income.
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多项选择题

入境特殊物品的，应提供相关的( )。

A．批件

B．海运运号单

C．空运出单号

D．规定的文件
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