会计专用印章保管必须坚持______的原则。
参考答案：专人保管、人离章收、班后入库(柜)
______ girls took part in the Super Voice competition, but only a few of them succeeded. [ ]
A. One million of
B. Thousands and millions
C. Millions of
D. Two millions
属于缓效杀菌剂的是
A．氨基糖苷类
B．利福霉素类
C．多黏菌素类
D．青霉素类
E．红霉素
