帮我写一篇英语作文:假定你是李华,你的英国朋友Peter来信向你咨询如何才能学好中文.要点 Dear Peter,I was received your letter and would like to anwser yourquestion.You were asked me how to learn Chinese well.I will give my suggestions on four aspects.Firstly,it is better for you to find a Chinese learning course and join it.There will be a professional teacher who can povide you some good methods.Secondly,i suggest you to read Chinese magzines and newspapers.Through this way,you can promote your ability on Chinese reading speed.Besides,you also could know about culture of China.Thildly,you can learn some Chinese songs.At last,making Chinese friends is helpful for your Chinese learning.I hope all this suggestions above is helpful to you.Best wishes,Hua Li
分)下图是近期在某些国家发现的新型冠状病毒。这一类似于 (共 7分)(1)呼吸道 没有(无)细胞结构(2)控制传染源(3)抗体 免疫细胞和免疫器官(4)遗传(基因)(5)实验法
如图是近期在某些国家发现的新型冠状病毒,这一类似于SARS(传染性非典型肺炎)的病原体通过呼吸道感染人类.该病存在人传染人的可能性,请分析回答: (1)呼吸道传染病是指病原体侵入呼吸道黏膜以后所引起的传染病,主要通过空气和飞沫传播.由题意可知,该疾病是由病原体新型冠状病毒通过呼吸道感染,引起的呼吸道传染病.新型冠状病毒的结构简单,是由蛋白质外壳.
下列关于新型冠状病毒的说法不正确的是( ) A、病毒必须寄生在活细胞内才能生活和繁殖,故营寄生生活正确;B、病毒没有细胞结构,是由蛋白质外壳和内部遗传物质构成的,内部的遗传物质即为核酸,故B说法正确;C、病毒没有细胞结构,故C错误;D、新型冠状病毒是非典型肺炎的病原体,说法正确,故D正确;故选:C
超难数学题,菜鸟误入,见下: 小芳少拿6本,少出 3+3×2=9元9÷6=1.5元/本