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【单选题】
对劣质商品需求的收入弹性eM是( )。A.
大于0
B.
小于0
C.
等于0
D.
大于1
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举一反三
【单选题】Thecostoftheairfareishigherthan________.A.the rail fareB.that of the rail fare###
A.
The cost of the air fare is higher than________. A.the rail fare
B.
that of the rail fare
C.
those of the rail fare
D.
which of the rail fare
【单选题】5 bullhead rail / flat bottom rail B. A ____________________ has a foot and head that are roughly even.
A.
bullhead rail
B.
flat bottom rail
【单选题】5 bullhead rail / flat bottom rail A. A ________________________ has a wider foot and narrower head.
A.
bullhead rail /
B.
flat bottom rail
【单选题】The cost of the air fare is higher than ______.
A.
the rail fare
B.
that of the rail fare
C.
those of the rail fare
D.
which of the rail fare
【单选题】Large cities prefer light rail to 'heavy' rapid-rail systems because light rail requires less construction material.
A.
Y
B.
N
C.
NG
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