单项选择题

FAB分型规定，急性淋巴细胞白血病的POX阳性率为多少

A.＜10％
B．＜8％
C．＜5％
D．＜3％
E．＜1％

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单项选择题

幼儿( )、( )月龄时，应分别至少查一次血常规。

A.17、20
B.18、20
C.18、30
D.17、30

单项选择题

A: I don't like watching TV soaps. I think they are a waste of time.
B: I______that. Millions of people are addicted to them!
A. can tell
B. wouldn't say
C. 'd never thought of
D. agree with