在A=kcl中，如果C以mol/L为单位，l以（）为单位，则k称为摩尔吸光系数。
A.mm
B.cm
C.dm
D.m
参考答案：B
________ seven or eight countries would come together to determine the direction of global markets.
A．Went away are the days when
B．Away went the days which
C．Gone are the days when
D．Went are the days that
用于被动免疫的是（）
A.伤寒疫苗
B.卡介苗
C.麻疹疫苗
D.白喉类毒素
E.破伤风抗毒素
