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单项选择题

在细胞膜的物质转运中，Na＋跨膜转运的方式是（　　）。

A.单纯扩散和易化扩散
B.单纯扩散和主动转运
C.易化扩散和主动转运
D.易化扩散和出胞或入胞
E.单纯扩散、易化扩散和主动转运
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