什么是跨步电压?
参考答案:
当带电体接地电流流入地下时,电流在接地点周围的土壤中产生电压降,人在接地点周围两脚之间出现的电压即跨步电压。
—You've got a cold, not the H7N9! Everything will turn out OK.
—______! I have been worrying about it for days.
A.What a relief
B.That's for sure
C.How surprising
D.I'm sorry to hear that
确定电脱水器运行台数计算公式:n=G/(24ρLV)中()是表示含水原油的密度。
A.ρL
B.ρLV
C.G
D.G/V