题目

Mary did not understand such sentences as “She is in blue today.” “You are yellow.” “ He has a green thumb.（大拇指）” “He has told a white lie.” and so on. . And she went to her teacher for help. Mary: Mrs Smith, there is a color in each of these sentences. What do they mean? Mrs Smith: In everyday English, Mary , blue sometimes means sad. Yellow …afraid. A person with a green thumb grows plants well. And a white lie is not a bad one. Mary: Would you give me an example for a white lie? Mrs Smith: Certainly. Now I give you some cake. In fact you don’t like it, bu下列有关细胞的结构和功能的说法，错误的是（ ）A. 核糖体是细胞内蛋白质的“装配机器”B. 细胞膜能提高细胞内化学反应的速率C. 内质网可以增大细胞内的膜面积，有利于酶的附着D. 核孔是细胞核与细胞质之间进行大分子物质的交换通道