2018～2022高二英语周报37期答案

One possible version:Dear Sir/ MadamKnowing that the First Snow Festival will be held during the winter holidays and some volunteers areneeded, I show great interest in it and want to get more experience. So Pm writing the letter to recommendHonestly speaking, I have rich experience as a volunteer, since I have served as a volunteer in intema-tional competitions. What's more, I'm outgoing and good at communicating with others, making it easy for meto get along with others. Above all, I have a good command of English, and can make myself understoodTherefore, I can serve foreign tourists welId appreciate it if you could give me such a chance. Looking forward to your replyYours

32.(每空2分)(1)AAxx×aXY、 BBXX XAAX Y(2) aaXYXAaX'X有斑红眼:有斑白眼:无红眼:无斑白眼=1111111(3)实验思路:让该无斑雌蝇和无斑雄蝇进行杂交,观察后代的性状表现预测结果及结论:若后代全为无斑,且雌雄比为11,则该无师的基因型为者后代中有无=103,则该无斑雌蝇的基因型为A

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