2022 英语周报 九年级 课标 42答案

作者对无人驾驶飞机的态度是客观的,故选B驶飞机的优点,也语篇解读]本文是一篇说明文,介细了不仅使食土填中加入酸盐会令植物更面于”发现,在物味道更好,还可它来清洁窗28.D[命题立意]考查主旨大意[试题解析]通读全文,并根据第二段的内容可知,本文主要介绍了醋能让植物在干旱的环境中生存,即能抗击干早,故选D29.C[命题立意]考查推理判断[试题解析]根据第二段中的“ The discovery was madeafter the researchers studied the Arabidopsis, a plantknown for its ability to survive in dry weather. It wafound that when the plant was placed in drought-likconditions, it produced a chemical called acetate( Aa na盐)一 the main component of vinegar.”可知,研究人员发现醋中的主要成分醋酸盐能让植物在干旱的条件下生存,故选C30.C[命题立意]考查细节理解试题解析]根据第四段中的“ In the experiment,wetargeted the staple foods of the world-rice, wheat andmaizeand the basic plant of breeding speciesrapeseed(油菜籽)”可知,实验中的目标植物有大米、小麦和玉米。故选C31.D[命题立意]考查推理判断[试题解析]根据最后一段中的“ Kim also told themagazine he's already been in touch with people allover the world who are interested in trying this simpleand cost-effective method out for themselves fromower growing companies to amateur gardeners.”可知Kim已与对此感兴趣的花卉种植公司联系,也就是他的研究吸引这些公司。故选D

22.(除注明外,每空2分,共15分)(1)细胞融合既能分泌新冠抗体又能无限增殖人体免疫系统会将鼠源单抗识别为抗原(2)PCR技术让噬菌体侵染宿主细胞,并表达新冠抗体基因(3)人的抗体生成相关基因新冠病毒具有多种抗原(决定簇)(3分)

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