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【单选题】
息税前利润变动率相当于销售额变动率的倍数，表示的是（ ）。A.
边际资本成本数
B.
财务杠杆系数
C.
经营杠杆系数
D.
复合杠杆系
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举一反三
【单选题】( )—I hear Susan will go to Beijing by herself.
A.
hat's true.________ her father ________ her mother will go with her.
B.
Both; and
C.
Either; or
D.
Not only; but also
E.
Neither; nor
【单选题】听力原文：M: Hi, Susan. I hear that you walk all the way to the office these days. W: Yes. I have found great pleasure in walking. That' s the type of exercise I enjoy very much. Why does the woman walk al...
A.
She takes it as a kind of exercise.
B.
She wants to save money.
C.
She loves doing anything that is new.
D.
Her office isn't very far.
【简答题】Dear Susan, I'm very gladly to hear you are coming to visit me the next Friday. Unfortunate, I won't be able to meet you at the airport although I have classes in the afternoon. You won't find difficu...
【简答题】某产品的边际贡献为正，如果单价和单位变动成本都提高10%，固定成本总额不变，则什么不变
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