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【简答题】
假定需求函数为Q=MP -N ,其中M表示收入,P表示商品价格,N(N>0)为常数。 求:需求的价格点弹性和需求的收入点弹性
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举一反三
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【单选题】It is a level that must extend beyond purely biological needs to comprise a set of indispensable machines and social interactions.
A.
consist
B.
surround
C.
encompass
D.
confine
【单选题】—That must have been a pleasant experience. — yeah, we ourselves.
A.
have been enjoying
B.
enjoyed
C.
were enjoying
D.
had enjoyed
【单选题】The number of rowing oars that must be carried in a motor-propelled open lifeboat on a cargo vessel is ______.
A.
determined by the Master
B.
specified by the Coast Guard
C.
specified by the manufacturer
D.
None
【单选题】—That must have been a long trip. —Yeah, it us a whole week to get there.
A.
takes
B.
has taken
C.
took
D.
was taking
【单选题】That's the very point__ A. that must be insisted B. which must be insisted C. that must be insisted on D. which
must be insisted upon
A.
a
B.
b
C.
c
D.
d
【单选题】What is one of the things that must be done before man can live on Mars?
A.
Its surface must be studied.
B.
Its temperature must be raised.
C.
Big spaceships must be built.
D.
Its air must be purified.
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