急淋白血病的特点正确的是（） A.PAS染色20％～80％阳性 B.过_爱下问搜题

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问题单项选择题

急淋白血病的特点正确的是（）

A.PAS染色20％～80％阳性

B.过氧化物酶染色阴性

C.苏丹黑染色阴性

D.非特异性酶酶染色阴性

E.以上都是

答案

参考答案：E

选择题

Thousands of foreigners were ________ to the Shanghai World Expo the day it opened.(2010·江苏)

A．attended

B．attained

C．attracted

D．attached

选择题

-- _________ you called yesterday?

-- Tom．Why?

A．Who it is that

B．Who is it that

C．Who was it that

D．Who it was that