测定AOX的微库仑计，每个月应校准1次。
参考答案：错
解析：测定AOX的微库仑计，每次测定前均应校准。
— She looks very happy. She __________ have passed the exam.
— I guess so. It’s not difficult after all.
A．should
B．could
C．must
D．might
推轧刀翘起半边推头发，属（）技法。
A.满推
B.半推
C.斜推
D.倒推
