有一种物质能顺浓度梯度进出细胞但却不能顺浓度梯度进出无蛋白质的磷脂双分子层膜这种物质出入细胞膜的方式是a自由扩散b协助扩散c主动运输 Template




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tomski有一种物质能顺浓度梯度进出细胞但却不能顺浓度梯度进出无蛋白质的磷脂双分子层膜这种物质出入细胞膜的方式是a自由扩散b协助扩散c主动运输 coloring