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【单选题】
如果给定一组证券,那么对于一个特定的投资者来说,最优证券组合应当位于( )。A.
他的无差异曲线中任意一条曲线上
B.
他的无差异曲线与该组证券所对应的有效边缘的切点处
C.
他的无差异曲线中位置最高的一条曲线上
D.
该组证券所对应的一条有效边缘上的任意一点
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举一反三
【单选题】To become a qualified librarian, you must take a ______ course at a special library school.
A.
two years'
B.
two-year
C.
two years
D.
two year's
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A.
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B.
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C.
that; which
D.
that; that
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A.
make up
B.
make of
C.
make sense
D.
make face
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