题目

超氧化物歧化酶（SOD）是一种源于生命体的活性物质，在生活实践中有非常重要的应用价值。下图为人工培育含SOD植物新品种的过程，相关叙述正确的是（ ） A . ①过程中最常用的方法是采用显微注射技术将SOD基因导入植物细胞 B . ②、③分别表示脱分化、再分化，两个过程不需要无菌操作也可完成 C . SOD催化O2形成H2O2的机制是为该反应提供活化能 D . 该育种方式利用了细胞工程和基因工程，能体现细胞的全能性 阅读理解 根据以上信息，选择最佳答案。 (1) The apartment with furniture is for ________ specially． [　　] A． families B． students C． tourists (2) The main cause of eyesight problems in School A is ________． [　　] A． reading in bed B． using computers C． watching TV (3) The number of the boys who had mobile phones in School B ________ from 2005 to 2007． [　　] A． increased rapidly B． grew slowly C． remained the same (4) In 2007, ________ girls had mobile phones in School B． [　　] A． 8 B． 14 C． 20 (5) If Jim has a cold, he should take ________． [　　] A． three cold pills each time B． the cold pills before meals C． the cold pills 3 times a day