2018-2022高一英语周报第二期答案

30.(1)促甲状腺激素(1分)下丘脑和垂体(2分)反馈(或负反馈)(1分)(2)是否加入成纤维细胞和甲状腺激素(2分)促进(1分)抑制(1分)【解析】本题主要考查甲状腺激素分泌的调节,考查学生的理解能力和实验与探究能力。(3)甲、乙、丙三个培养基上都加入了角质形成细胞,其区别是是否加入成纤维细胞和甲状腺激素。对比甲、丙两组,丙组加入甲状腺激素后,角质形成细胞的相对数量增多,因此甲状腺激素能促进角质形成细胞的增殖。分析甲、乙、丙三组,乙组在加入了成纤维细胞后,角质形成细胞的数量减少,因此转化生长因子能抑制角质形成细胞的增殖。

书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

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