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【单选题】
垄断市场上,边际收益与平均收益的关系是( )A.
边际收益大于平均收益
B.
边际收益小于平均收益
C.
边际收益等于平均收益
D.
边际收益曲线交于平均收益曲线的最低点
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【单选题】We can know that before 1995 Mary 。
A.
had two books published
B.
received many career awards
C.
knew how to use a computer
D.
supported the JDRF by writing
【简答题】Like many lovers of books, Mary and her husband, Richard Goldman, seldom walked past a bookstore without stopping to look inside. They often talked of opening their own store one day. When Mary was ho...
【简答题】Like many lovers of books, Mary and her husband, Richard Goldman, seldom walked past a bookstore without stopping to look inside. They often talked of opening their own store one day. When Mary was in...
【单选题】Three books by Mary.
A.
has been written
B.
have been written
C.
was written
D.
were written
【单选题】In order to catch up with her classmates, _____.
A.
a lot of books were bought by Mary’s mother
B.
Mary’s father helped her with her lessons
C.
Mary worked hard at her lessons around the clock
D.
Mary’s classmates helped her a lot
【单选题】—Mary likes reading books.
A.
Jane likes also
B.
So Jane does
C.
Also does Jane
D.
So does Jane
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