为了避免电气设备由于绝缘强度降低而产生短路电弧,火花放电等现象,对电气设备的()作出了规定。
A.防爆类型
B.防爆级别
C.爬电距离
D.电气间隙
E.防护等级
参考答案:C, D
-Why not go and have dinner m a restaurant?
-______. It's too expensive. [ ]
A. Why not
B. I agree
C. I'm afraid not
D. I'm sure
i5M8.8智能多轴立式加工中心采用北京CTB伺服刀塔,可装载()把刀具。
A.8
B.9
C.10