单项选择题

三元素法虽然精确,但计算过程复杂,有时可用较为简单的( )

A.比例法和比例变异法
B.比例法和比例常数法
C.常数法和比例常数法
D.定值法和比例常数法
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单项选择题
听力原文：W: Hi, Don. Would you like to go swimming this afternoon?M: I wish I could, Jenny, but I have to spend the rest of the day in the library. I have a ten-page paper due tomorrow.W: Oh, is that for Professor Smith's class?M: Yes, I have to write an article on a poem we read in class.W: That's harD.How is it going so far?M: Not very well. And I also have to study a lot for maths and history. I don't know how I'm going to do it at all.W: You know, Don. I've been doing well in maths, so I'd be happy to help you.M: OK, Jenny, I’ll see you in front of the library.W: Good luck with the poem.What ts Jenny going to do?A.Go to a maths class.B.Go to the laB.C.Go swimming.
A.W:
B.
W:
C.
W:
D.
M:
E.
W:
F.
What
G.Go
H.
B.Go
I.
C.Go
J.
单项选择题
运营费用是维持房地产正常生产、经营或使用( )及归属于其他资本或经营的收益。
A.可以支付的费用
B.必须支付的费用
C.不必支付的费用
D.可以拖欠的费用
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