One of the factors which affects the circulation of ocean currents is().
A. humidity
B. varying densities of water
C. vessel traffic
D. the jet stream
电气工作人员在10KV配电装置上工作,其正常活动范围与带电设备的最小安全距离为0.35m
A. 正确
B. 错误
The additional mark ()in the Classification Certificate for Machinery represents that personnel are watching at engine assembly control station and monitoring all machinery and electronic devices.
A. BRC
B. MCC
C. AUT-0
D. AUT-1
按温度分类,食品储存库房包括()
A. 常温库
B. 冷冻库
C. 冷藏库