题目内容
(请给出正确答案)
[单选题]
防雷区(Lightning Protection Zone,简称LPZ)是指雷击电磁环境中需要限定和控制的区域。下列
A.LPZ2
B.LPZ1
C.LPZ0A区
D.LPZ0B区
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A.LPZ2
B.LPZ1
C.LPZ0A区
D.LPZ0B区
B.joint grounding resistance ≤0.5Ω
C.The voltage difference between lightning protection ground, equipment system ground, and -48V GND should be less than 1V
D.It is recommended that the working ground, protection ground, and lightning protection ground should be separated from each other
A.秒杀前2个小时极大影响着正常秒杀效果的销量走向
B.秒杀前30分钟将进度条冲刺到80%~90%
C.手动广告将listing页面推广到Deal界面
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