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【单选题】
胃肠平滑肌动作电位产生的主要离子基础是A.
K+内
B.
Na+内流
C.
Ca2+内流
D.
Ca2+与K+内流
E.
Na+与K+内流
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A.
one
B.
other
C.
it
D.
that
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A.
them
B.
ones
C.
it
D.
one
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A.
one
B.
ones
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it
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them
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A.
Perfect!
B.
Good idea!
C.
Not bad.
D.
SoSo.
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B.
ones
C.
it
D.
one