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【单选题】
安静状态时,细胞膜对何种离子通透性最高A.
K+
B.
Na+
C.
Ca2+
D.
Cl-
E.
Mg2+
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反馈参考答案：
举一反三
【简答题】 v. to deliberately make something such as a feeling or an activity last longer
【简答题】What makes the American deliberately unhappy according to the author?
【单选题】If a child is wilful, are they likely to cause damage or harm (a) deliberately, or (b) by mistake?
A.
deliberately
B.
by mistake
【简答题】Obstacles deliberately placed in the creation of music contribute to its success.
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