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【单选题】
灰兔和白兔杂交，F 1 灰兔，F 1 雌雄个体相互交配，F 2 中有灰兔、黑兔和白兔，比例为9：3：4，则以下说法错误的是 [ ]A.
家兔的毛色受两对等位基因控制
B.
F 2 灰兔中能稳定遗传的个体占1/16
C.
F 2 灰兔基因型有4种，能产生4种配子，其比例为AB：Ab：aB：ab＝4：2：2：1
D.
F 2 中黑兔与白兔交配，后代出现白兔的几率是1/3
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举一反三
【单选题】Other things the same, if reserve requirements are increased, the reserve ratio
A.
increases, the money multiplier increases, and the money supply increases.
B.
increases, the money multiplier decreases, and the money supply decreases.
C.
decreases, the money multiplier increases, and the money supply increases.
D.
decreases, the money multiplier decreases, and the money supply increases.
【单选题】The Fed is reluctant to use reserve requirements to control the money supply and interest rates because
A.
they have the potential to create lending problems for banks with high excess reserves.
B.
frequent changes in reserve requirements complicate liquidity management for banks.
C.
of their weak impact on the money supply.
D.
of only (a) and (b) of the above.
【单选题】Other things the same if reserve requirements are decreased, the reserve ratio ( )
A.
decreases, the money multiplier increases, and the money supply decreases.
B.
increases, the money multiplier increases, and the money supply increases.
C.
decreases, the money multiplier increases, and the money supply increases.
D.
increases, the money multiplier increases, and the money supply decreases.
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