某物质从低浓度�高浓度跨膜运输该过程 A.没有载体参与 B.为自由扩散 C.为协助扩散 D.为主动运输——青夏教育精英家教�—— Template




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tomski某物质从低浓度�高浓度跨膜运输该过程 a.没有载体参与 b.为自由扩散 coloring