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【多选题】
关于短期成本，下列说法中正确的是（ ）。A.
随着产量的增加，平均固定成本不断下降
B.
短期平均成本、平均可变成本和短期边际成本曲线都是先下降后上升
C.
随着产量的增加，平均可变成本与短期平均成本的距离越来越小
D.
短期边际成本曲线先后经过短期平均成本曲线和平均可变成本曲线的最低点
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皮皮学刷刷变学霸
举一反三
【单选题】There being no cause for alarm, you ______ in such a panic yesterday.
A.
need not act
B.
did not need to act
C.
need not have acted
D.
did not need to have acted
【单选题】________ no cause for alarm, the old man went back to his bedroom.
A.
There was
B.
Since
C.
Being
D.
There being
【单选题】_______ no cause for alarm, the old man went back to his room.
A.
There was
B.
Since
C.
Being
D.
There being
【单选题】整数环的带余除法中满足a=qb+r时r应该满足什么条件?
A.
0<=r< /div>
B.
1
【单选题】There no cause for alarm, she went back to her room.
A.
being
B.
was
C.
be
D.
has been
【单选题】______no cause for alarm, the old man went back to his bedroom.
A.
There was
B.
Due to
C.
As to
D.
There being
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