礼仪主体的类型包括() ["个人主体","临时团体","组织主体","社会","固定团体"]
职业服饰的基本特征有() ["现实性","审美性","象征性","实用性","抽象性"]
6502电气集中道岔选出的顺序是怎样的?
打电话注意的礼仪问题主要包括() ["选择恰当的通话时间","通话目的明确","安排通话内容","挂断电话时注意使用礼貌用语","不直接回答对方问话"]
改进寇氏法要求() ["A.设5~7剂量组 ","B.每个剂量组小鼠不可少于10只 ","C.组距为几何级数 ","D.以上都是"]
在64S型继电半自动闭塞设备中,为什么要求TCJ缓放?