IgG、IgM的补体结合点依次分别为()
A．CH2、CH3
B．CH1、CH2
C．CH1、CH3
D．VH、CH
E．VL、CH
参考答案：A
He will have to find some other work, for he can't ________ this loud noise any more.
A．come up with
B．put up with
C．make up with
D．keep up with
孔的精度要求较高和表面粗糙度值要求较小时，应取()的进给量。
A、较大
B、较小
C、普通
D、任意
