题目内容

By the mass media, we should appeal to do some immediate effective actions from the authorities.

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Part II WritingDirections: Write an essay on the following topic. The topic has an outline you can followTopic:The Effects of Iphone Addiction1. Introduction：Some people are indulging in iphone, which already have side-effect on their normal life2. Reasons of iphone addiction and effects of iphone addiction.3. Your advice

对外界抵抗力最强的细菌的结构是:

A. 细胞壁
B. 荚膜
C. 核质
D. 芽胞
E. 质粒

关于革兰氏阴性菌细胞壁的叙述中,哪一项是错误的:

A. 肽聚糖含量少
B. 无磷壁酸
C. 致病力与所含脂多糖有关
D. 对溶菌酶较敏感
E. 有外膜层

与细菌的黏附有关的是:

A. 普通菌毛
B. 荚膜
C. 性菌毛
D. 鞭毛
E. 质粒