盐酸小檗碱属于哪类抗菌药
A．喹诺酮类
B．植物成分类
C．酚类
D．磺胺类
E．醇类
参考答案：B
A clean environment can help the city ________ the Olympics, which in turn will promote its economic
development. [ ]
A. wish for
B. long for
C. bid for
D. stand for
用兆欧表摇测设备绝缘时，在摇测（）必须对被试设备放电。
A.前
B.后
C.前后
D.中
