炎德英才12月份大联考高一答案

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第四部分写作第一节Dear elviraIm Li Hua. Our club is going to hold an Englishpoetry party. Knowing you re interested in poetry, T'mwriting to invite you to join in this activity.It will be held in our school hall at 9 next FridayAfter our teacher delivers a speech on English poems, allmembers of the club will share their favourite Englishpoems. Afterwards, we will pick out popular poemswhich will be posted on the school,s information boardWhat's more, we would appreciate it if you could shareyour favourite poemYou're definitely welcome to join us. Looking forwardto your early reply.Yours.Li Hua

12.A解析：本题考查遗传物质的探究及本质等有关知识。孟德尔发现遗传因子并证实了遗传因子的传递规律，但没有发现遗传因子的化学本质，A项错误；噬菌体侵染细菌时只有DNA进人细菌，蛋白质外壳留在细菌外，这样DA和蛋白质就彻底分开了，因此噬菌体侵染细菌实验比肺炎链球菌体外转化实验更具说服力，B项正确；沃森和克里克在探究DA结构时利用了物理模型构建的方法，C项正确；烟草花叶病毒感染烟草实验说明该病毒的遗传物质是RNA,D项正确。