IQ＝［15（X-M）］/S+100称为（）。
A.比率智商
B.离差智商
C.百分位智商
D.中位数智商
E.人格智商
参考答案：B
－It's difficult 'for the village children to cross the river for school.
－I think a bridge _________ over the river [ ]
A. should be built
B. is being built
C. has been built
D. was built
下列方法中不用于酊剂制备的是（）。
A.煎煮法
B.渗漉法
C.稀释法
D.浸渍法
