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问题 单项选择题

每个胎盘平均可采集到单核细胞（MNC）数（）

A.1.0×109

B.2.0×109

C.3.0×109

D.4.0×109

E.5.0×109

答案

参考答案：A

选择题

---Christmas Day is coming. Could you tell me _____________?

---Well, I will go to see the film called 1942 by Feng Xiaogang.

A．what you will buy for your family

B．if you will have a party

C．what you will use to decorate your house

D．what you will do on that day
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单项选择题

红花粉末中可见( )

A．圆形油细胞
B．管道状分泌细胞
C．油室
D．乳管
E．黏液细胞
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