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第二节One possible versionDear Mr. TomIm writing to invite you to be present at the recitationcontest organized by the reading club at 3: 00 next Wednes-day afternoon in the lecture hall. If available then. couldyou do us a favor? And we would appreciate having you as ajudge. By the way, it would be very nice if you can recommend some classic English literary works suitable for usstudentsanks for considering our requestIm looking forward to your reply at your earliest con-venience lYours sincerelyLi Hua
18.(1)圆底烧瓶(1分);浓硫酸(1分);吸收尾气中的防止空气中的水蒸气进入装置(2分)$$SO2、Cl2,$$$$(2)Na2SO3+H2SO4Na2SO4+SO2+H2O($$不写“△”不扣分,2分)(3)冷水浴(2分)$$(4)K1、K3(2$$$$K2(2$$分)分);$$(5)SO2Cl2+2H2OH2SO4+2HCl$$(写了“”也给分,2分)
