单项选择题

2.2外周血Hb减少比RBC数减少更为显著的贫血是

A．再生障碍性贫血
B．巨幼细胞贫血
C．缺铁性贫血
D．肾性贫血
E．生理性贫血

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不定项选择

事故通风装置所排出的空气，一般都不进行处理。

A．正确
B．错误

单项选择题

When someone wants to end a conversation, he will say, “It was nice talking to you, but I’ve got to get ( ) .” A. coming B. going C. talking D. chatting