架空线路不应采用单股的铝线或铝合金线。高压线路不应采用单股的铜线。()
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听力原文:M: When do you want to leave for that town, mother?
W: I am not sure. But maybe we should leave on Tuesday after work. It's a long drive. But I would rather get there late Thursday. We have several days off this time after all.
M: How long is it?
W: 8 hours.
M: What are you going to take?
W: Mostly dresses and T-shirts.
M: You don't think it will be cold at night there?
W: Maybe. I am going to take a sweater or a coat just in case.
What is the woman going to do?
Attend a party.
B. Take a holiday.
C. Attend a meeting.
我国发展对外经济关系的基础是()
A. 对外贸易
B. 技术出口
C. 对外投资
D. 承包国外工程