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问题 单项选择题 A1型题

下列化学物质是间接作用的化学致癌物，除外（）。

A.多环芳烃

B.芳香胺类

C.亚硝胺类

D.环磷酰胺

E.黄曲霉毒素

答案

参考答案：D

解析：烷化剂与酰化剂类，如环磷酰胺、氮芥、亚硝基脲等是直接致癌物质。

单项选择题

M: What would you like for dessert I think I’ll have apple pie and ice cream.
W: The chocolate cake looks great, but I have to watch my weight. You go ahead and get yours.
Question: What would the woman most probably do

A. She’ll have some chocolate cake.
B. She’ll take a look at the menu.
C. She’ll go without dessert.

D. She’ll prepare the dinner.
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问答题

脑膜瘤MRI表现有哪些？
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