皮皮学，免费搜题
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【单选题】
下列关于心室肌细胞Na+通道的描述，哪一项是错误的A.
是电压依从性的
B.
激活和失活的速度都很快
C.
单个 Na + 通道的开放是无的
D.
D ．该通道可被四乙铵特异性阻断
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【单选题】已知东京外汇市场上的汇率如下：£1=US$1.9450/80，US$1=JP￥133.70/90，则某公司以英镑买进日元的汇率应该是（ ）。
A.
260.84
B.
260.05
C.
260.55
D.
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【简答题】Imagine when you are sailing an ocean for the first time, you see a big fish swimming near your ship. You might be scared, and worried about whether it will turn over your ship for a meal. In fact, it...
【单选题】已知东京外汇市场上的汇率如下:£1=US$1.9450/80,US$1=JP¥133.70/90,则某公司以英镑买进日元的汇率应该是多少
A.
260.84
B.
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C.
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D.
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【单选题】In the daytime, you see a large sailing vessel on the beam. You know that she is also propelled by machinery if she shows ______.
A.
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B.
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C.
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D.
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【单选题】Before sailing for a foreign port，what document must you get? ______.
A.
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B.
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C.
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D.
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