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【单选题】
关于肾小吸收碳酸氢根的叙述，正确的是A.
与H + 的分泌无关
B.
HCO 3 -简单扩散直接扩散
C.
不需要碳酸苷酶催化
D.
通过CO 2 的形式跨腔面膜转运
E.
远曲小管重吸收最多
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皮皮学刷刷变学霸
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【单选题】有关地球自转的叙述，正确的是（） ①从北极上空观察，地球自转的方向是顺时针方向 ②从南极上空观察，地球自转的方向是顺时针方向 ③从北极上空观察，地球自转的方向是自西向东 ④从南极上空观察，地球自转的方向是自东向西
A.
①②
B.
①③
C.
②③
D.
③④
【单选题】A group of business entrepreneurs who worried about their teenage children drinking and driving decided there must be some way to approach this problem proactively. They came up with an idea for a pai...
A.
prototype
B.
concept test
C.
product concept
D.
product image
【简答题】US President Donald Trump has triggered controversy after raising the possibility of ending birthright citizenship in the United States by signing an executive order, a move experts say would be uncon...
【简答题】《公路工程技术标准》规定,公路上的圆曲线最小半径可分为( )和( )二种。
【单选题】A group of business entrepreneurs who worried about their teenage children drinking and driving decided there must be some way to approach this problem proactively. They came up with an idea for a pai...
A.
prototype
B.
concept test
C.
product concept
D.
product image
E.
product idea
【简答题】 Many of us would pay 1)____ dollar for a 2)_____ that would 3)______our ability to 4)________, but we found a scientist who is far more excited about a pill that promises to do exactly the 5)_____...
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