单项选择题

在爆炸性气体环境中，低压电力、照明线路绝缘导线和电缆的额定电压不低于工作电压，且不应低压下列哪项数值？

A.400V
B.500V
C.750V
D.100V
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听力原文：M: You must be pretty excited about your trip to EuropE.When is it that you're leaving?W: In just three weeks. And I am excited! But there are still a few things I need to do before I go.M: Like what?W: Like renewing my passport, going to the travel agency, buying my plane tickets, and figuring out what to do with my apartment while I'm gonE.M: You're not going to give it up, are you?W: No way! I'll never find another apartment around here! But I don't like the idea of paying three month's rent on an empty apartment, either.M: I don't blame you. Perhaps you could sublet it.W: Yes, but who to?M: Hmm, let me think. Oh, I know, just a person. An old colleague of mine, Jim Thomas is coming here to do some research this summer, from June through August.W: Well, that's exactly when I'll be away. It sounds ideal. As long as the landlord agrees.M: Tell you what. I'll be calling Jim later this week anyway, so I'll mention it to him then.W: Well, thanks, Bill. Let me know what happens. That extra money would really come in handy.What does the woman need to do at the travel agency?A.Purchase her plane ticket.B.Change her plane ticket.C.Pick up a passport application form.D.Arrange for her accommodations in EuropE.
A.M:
B.
M:
C.
M:
D.
W:
E.
W:
F.
M:
G.
W:
H.
What
I.Purchase
J.
B.Change
K.
C.Pick
L.
D.Arrange
M.
多项选择题
用最大短路电流校验导体和电器的动稳定和热稳定时，应选取被校验导体和电器通过最大短路电流的短路点，在选取短路点时，下列哪些表述符合规定？（ ）
A.对带电抗器的（3～10）kV出线回路，校验母线与母线隔离开关之间隔板前的引线和套管时，短路点应选在电抗器前
B.对带电抗器的（3～10）kV出线回路，校验母线与母线隔离开关之间隔板前的引线和套管时，短路点应选在电抗器后
C.对带电抗器的（3～10）kV出线回路，除母线与母线隔离开关之间隔板前的引线和套管外，校验其他导体和电器时，短路点应选载电抗器之前
D.对不带电抗器的回路，短路点应选在正常接线方式时短路电流为最大的地点
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