英语周报七年级2022-2022第十五期答案

19.B【解析】可用Cl2和NaOH溶液反应制取该消毒氵液,A项正确;由信息知,饱和NaCO溶液的pH约为11,而该消毒液的pH=12>11,主要是因为该消毒液中含有一定量的NaOH,B项错误;酸性条件下,CO和C-反应生成Cl2和H2O,C项正确;根据较强酸制取较弱酸可知,D项正确。

第三节书面表达One possible version:Dear PeterHow about your life? I am writing to convey my grati-de for your kind help and care during my stay in yourcountry, without which I wouldnt have enjoyed itmuchGuided by you, I had a chance to visit some places ofinterest in England and experience such unique culture aswell as beautiful scenery. Thanks to your generous help, Ido believe that I have a better understanding of your countryand culture. What's more, during the week, the comfortable room, delicious meals and especially your friendlyfamily made me feel at homeI will be more than pleased if I have the opportunity to"repay your kindness. I will show you around in China. I amlooking forward to your coming.YoursLi H

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