题目

Then comes the July, and with it are examinations; but these are soon finished and with them ends the school year. Boys and girls have nearly two months holiday before them as they leave school by train and car to return home to their fathers and mothers. The summer holidays are the best part of the year for most children. The weather is usually good, so that one can spend most of one’s time playing in the garden or, if one lives in the country, out in the woods and fields. Even if one lives in a big town, one can usually go to the park to play. The best place for a summer holiday, 18.下列有关物质出人细胞方式的叙述中,错误的是(  )A.各种离子出人细胞并不都是主动运输,有的是被动运输B.葡萄糖进入红细胞,需要载体蛋白协助,不消耗能量,是被动运输C.神经细胞的突触前膜释放乙酰胆碱的过程,体现膜的流动性D.醋酸洋红进入细胞使染色体着色,体现了膜的选择透过性
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