团聚体和()均为多分子体系的实验模型。
A.类蛋白质
B.类蛋白质微球体
C.微芽
D.微粒
参考答案:B
---- An ant has two stomachs --- one for itself and the other for others.
----Really? Quite interesting. I ________ anything about it.
A.don’t know
B.hadn’t known
C.haven’t known
D.didn’t know
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