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【单选题】
The main transmembrane ion fluxes of ventricular muscle cells at plateau are ( )A.
sodium ion inflow and potassium ion outflow
B.
sodium ion inflow and calcium ion outflow
C.
calcium ion outflow and potassium ion inflow
D.
calcium ion inflow and potassium ion outflow
E.
potassium ion inflow and sodium ion outflow
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【单选题】The error in the sentence 'Does he can sing?' is an example of______.
A.
addition
B.
substitution
C.
omission
D.
misordering
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A.
reference
B.
substitution
C.
conjunction
D.
ellipsis
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