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问题 多项选择题

下述与自身免疫病的发生有关的是（）。

A.隐蔽抗原的释放

B.某些与自身组织成分具有共同抗原性的微生物感染

C.自身组织或器官MHCⅠ类抗原的异常表达

D.长期使用广谱抗生素

E.机体免疫系统功能失常

答案

参考答案：A, B, C, E

解析：自身免疫发生的机制，不包括长期应用抗生素。

选择题

Some abstract modern paintings were ______ my understanding; I simply couldn’t figure out what the painters really wanted to tell us.

A．within

B．behind

C．around

D．beyond
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选择题

.He had a bad week. He lost his job, ________ ,his car was stolen.

A．on top of that

B．on top of it

C．and on top of which

D．on top of which
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