2022 英语周报 九年级 AHW 8答案

30.(10分,每空1分)(1)蛋白质RNA是单链,DNA是反向平行双螺旋结构更稳定(2)效应T细胞体液抗体(3)细胞凋亡(4)下丘脑渗透压感受器减少(5)抗体和记忆细胞

Writing 3Dear JamesI am glad to have received the book Biogra phy o/Lincoln you bought for me. I like it very much and amwriting specially to express my thanks for your kindness.You know, Lincoln is my hero. He came from a poorfamily and had only several monthseducationHowever, he became a present of the United States. Whata great man! When I received the book, I felt more thanexcited. That was not only because you sent me a birthdaresent but also because it was the exact book I wantedYou are so thoughtful!Thanks again and best wishes to youYLi h

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