纤维内镜消毒首选_____。
参考答案：2％碱性戊二醛浸泡
Bob's doctor suggests _____ for a few days .
A．that he is resting
B．that he has to rest
C．him to rest
D．that he rest
螺口灯头的螺纹应与（）相接。
A、相线
B、零线
C、地线
