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【单选题】
以下说法错误的是:A.
只要总产量减少，边际产量一定是负数
B.
只要边际产量减少，总产量也一定是减少
C.
边际产量曲线一定在平均产量曲线的最高点与之相交
D.
只要边际产量大于平均产量，平均产量就会一直递增
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举一反三
【单选题】He often reads books in the , because there are so many books there. [ ]
A.
pool
B.
library
C.
mall
D.
restaurant
【单选题】There are a great many books in the store, some are useful to us. [ ]
A.
of them
B.
in which
C.
of which
D.
in them
【简答题】From the passage we can infer this textbook is written mainly for ______ to read.
【简答题】Some people enjoy reading and they like to go to the book show. There are many books in the show. If you can’t find some books in libraries or bookshops, come to the book show. You must find them here...
【简答题】市场营销观念的发展经历了哪几个阶段？
【简答题】There are many books in the s________.
【简答题】There ____ many books in our bedroom.
【单选题】He picked a textbook from the bookshelf and then commenced to read.
A.
directed
B.
commented
C.
committed
D.
began
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