2022 英语周报 七年级 课标 10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!

16.(1)使硫酸二甲酯顺利流下(1分);H3C-CH3+2H2O—→2CH3OH+H2SO4(2分)(2)吸收硫酸二甲酯、硫氰酸甲酯等有机物,防止污染(1分);导气、冷凝回流(1分);H3CO-sOCH3+2ksV60℃2CH3SCN+K2SO4(2分)O(3)分液漏斗(1分);蒸馏水(1分);将适量水倒入分液漏斗,将油层转入分液漏斗,充分振荡,静置分层,从下口取出油层,上口倒出水层,重复2~3次(2分)4)分馏(或蒸馏)(1分);75(2分

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