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
暴溢
