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【单选题】
动作电位下降支产生的机制是A.
Ca 2+ 的内流
B.
K + 的内流
C.
Na + 的内流
D.
K + 的外流
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举一反三
【单选题】Transitions like “therefore”, “due to”, and “as a result”, are expressions indicating ____________.
A.
time sequence
B.
comparison and contrast
C.
classification
D.
cause and effect
【单选题】He may not like my visit, but I shall go and see him _____.
A.
anyway
B.
someway
C.
though
D.
therefore
【单选题】在Excel 2010中，若要在一个单元格中计算出B3：E6区域内的最大值，则应输入（）。
A.
=MAX（B3：E6）
B.
=MIN（B3：E6）
C.
=SUM（B3：E6）
D.
==MAX（B3：E6）
【单选题】---I’m sorry to hear that some villagers got disabled in the earthquake. ---That’s too bad, but ________. [ ]
A.
all is well that ends well
B.
the darkest hour is nearest the dawn
C.
where there is life, there is hope
D.
it is good to have friends in trouble
【单选题】I don’t like her face; , she smokes, which is something I hate.
A.
also
B.
instead
C.
however
D.
therefore
【简答题】E2PROM存储器的写入、擦除原理?
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