2023英语周报jxg第四期答案

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30.(除注明外,每空1分,共10分)(1)红花X(2)AAXX、AaXY45/64(3)实验思路:让该红花抗病雌株与F:中的白花感病雄株杂交,观察子代的表现型及比例(2分)实验结果:若子代中红花抗病雌株:红花抗病雄株=1:1,则该红花抗病雌株基因型为AAX"X,若子代中红花抗病雌株:红花感病雌株:红花抗病雄株红花感病雄株=111:1:1,则该红花抗病雌株基因型为AAXx';若子代中红花抗病雌株:白花抗病雌株红花抗病雄株:白花抗病雄株=11111:1,则该红花抗病雌株基因型为AaX"X;若子代中红花·白花一1·1且抗病雌株感病雌株'抗病雄株:感病雄株1:1:1:1,则该红花抗病雌株基因型为 AnX X(合理即可,4分,答出一点给1分)

One possible versionSeveral minutes later, the ice broke suddenly and Harry's feet sank into the water. It was noep, but his legs got wet to the knees. Harry was so upset that the accident would delay hisschedule. He had to find some firewood to build a fire to dry his clothes. He pulled off his glovestook out his matches, and lighted the fire. Seeing the burning fire, he had thought he was safe. Butsuddenly, without warming, a heavy mass of snow dropped down. The flame of hope was put outUnluckily, his dog ran away and the fear of death came over Harry. He had no choice but torun to save himself. However, he did not feel his feet when they hit the ground. Having falleneveral times, he decided to rest a while. As he lay in the snow, he noticed he was not shaking. Hecould not feel his nose or fingers or feet. A feeling of horror came into his mind. It was when herealized he was going to die that he heard a bark and the noise his friends made

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