皮皮学，免费搜题
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【单选题】
根据色谱原理不同,色谱法可分为( )A.
硅胶和氧化铝色谱
B.
薄层色谱和柱色谱
C.
正相色谱和反相色谱
D.
分配色谱、吸附色谱、离子交换色谱、凝胶滤过色谱
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】When hyperinflation forces Emily to visit her bank very frequently to keep her cash holdings to a minimum, economists say that Emily has a:
A.
shoe-leather cost.
B.
menu cost.
C.
unit-of-account cost.
D.
Fisher effect.
【单选题】Hyperinflation is most likely when it is fueled by
A.
ever-increasing levels of government spending.
B.
declines in the velocity of money.
C.
continuously rising money demand.
D.
continuous increases in the money supply inever-increasing volume.
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