2022英语周报七下外研版答案

5.D【解析】红眼雌果蝇有两种基因型,即X"X"、XWX",与白眼雄果蝇XY杂交,子代中不可能出现雌果蝇均为红眼,雄果蝇均为白眼;白眼雌果蝇XX与红眼雄果蝇XWY杂交,子代中雌果蝇X"x均为红眼,雄果蝇X"Y均为白眼;芦花公鸡有两种基因型,即28zB、ZB2,与非芦花母鸡2W交配,子代中不可能出现公鸡均为非芦花,母鸡均为芦花;芦花母鸡ZBW与非芦花公鸡z2交配,子代中公鸡2z均为芦花,母鸡W均为非芦花。故选D。

第一节One possible versionDear Ms JenkinsI'm writing to ask you for help. Our school is going to sponsor an exhibition of Chinese paintings in theschool library next month. As president of the student council, i have been assigned the job of drafting an arnouncement in English as there aredreds of international students in our schoohave already written a rough draft of the above-mentioned announcement. But I'm afraid that there aresome mistakes in the English language. So I am hoping you would correct my possible mistakes in the announce-ment that i have attachedId appreciate it if you could do me the favocerely yourLIH

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