单项选择题

下列项目中，不属于现金持有动机中交易动机的是( )。

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单项选择题

关于HCO3-的重吸收，错误的说法是
A、肾小球滤过的HCO3- 80% ~ 85% 在近端小管被重吸收
B、肾小管重吸收是以CO2的形式重吸收
C、直接以HCO3-的形式重吸收
D、与Na+一起重吸收回血液

单项选择题

What’s the hidden assumption of the claim “Cloning human beings is wrong because it is unnatural”？
A、Cloning human being is unnatural.
B、Human beings is natural.
C、Whatever that is unnatural is wrong.
D、Natural things are wrong.