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【单选题】
商品价格中______是指商品价格的主要依据和最低经济界限，同商品价格成正比例关系变动。A.
商业费用
B.
生产成本
C.
流通费用
D.
利润
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【简答题】遥想公瑾当年, , 。 , 、 。
【简答题】遥想公瑾当年, 。
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A.
was since
B.
have been after
C.
has been since
D.
is for
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【简答题】遥想公瑾当年, , 。
【简答题】遥想公瑾当年, , 。 , 、 。
【简答题】遥想公瑾当年, ( ), ( )。公瑾指 ( )
【单选题】— Where is David? — I think he ____ Australia. [ ]
A.
has gone to
B.
has been
C.
has gone
D.
has been to