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题目类型:[单选]
[单选] 影响细胞膜上单纯扩散的因素是( )
A
膜两侧的不同物质的浓度差
B
扩散通量与膜两侧的浓度差成反比
C
与物质的脂溶性有关
D
水溶性物质大于脂溶性物质
E
需要载体的协助
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略
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