英语周报2021-2022九年级30期答案

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!

19.(1)三颈烧瓶(1分);通过观察装置A中产生气泡的速率来调节气体的流速(2分)(2)2Cl2+Na2OO=Cl2O+CO2+2NaCl(2分);该反应放热,温度升高C2O会分解(2分)(3)2Fe++3ClO-+10OH-2FeO-+3C-+5H2O(2分);生成的K2FeO4在Fe+和Fe(OH)3的催化作用下会发生分解(或其他合理答案,2分)(4)82.5%(2分)

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