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【单选题】
引起神经纤维动作电位复极化是由于A.
K + 外流
B.
CI - 内流
C.
Na + 内流
D.
K + 内流
E.
Na + 外流
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【简答题】阅读短文，选择正确答案。 Good morning, ladies and gentlemen. Here's morning news. Yesterday afternoon a ten-year-old school boy swallowed (吞下) a pen cap! The boy was daydreaming in class. Without knowing what he ...
【简答题】A:Good morning(afrernoon,evening),sir(madam,ladies and gentlemen)B:Good morning.(afternoon,enening)
【简答题】同测效度又名（ ）。
【简答题】Good morning, ladies and gentlemen. I'm here today to share a good lesson with you. It is a true story about an overseas student 小题1: in Germany. After years of hard work, this student graduated with ...
【简答题】( )是目前发现的能在无生命培养基中生长繁殖的最小最简单的细胞。
【单选题】Good morning .Ladies and gentlemen. I’m Kathy, I’m ___the first class.
A.
welcome
B.
guide to
C.
in charge of
D.
the same
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