小细胞低色素性贫血MCV（）
A．＜70fl
B．＜80fl
C．80～100fl
D．70～100fl
E．＞100fl
参考答案：B
--- Would you like black or white coffee?
--- Well, I ______ coffee ______ milk.
A．prefer ; to
B．prefer; with
C．would rather; than
D．like; better
真核细胞mRNA为
A．增强子B．单顺反子C．多顺反子D．衰减子
