题目

下列说法正确的是（ ） A. H2O、H2S、H2Se的分子间作用力依次增大 B. SiO2和晶体硅都是共价化合物，都是原子晶体 C. NaOH 和 K2SO4 的化学键类型和晶体类型相同 D. NaHSO4加热融化时破坏了该物质中的离子键和共价键 答案：【答案】C 【解析】 【详解】A．H2O、H2Se、H2S的分子间作用力依次减小，因为H2O分子间含有氢键，而其它的两种物质不含氢键，故A错误； B．SiO2和晶体硅都是原子晶体，但晶体硅是单质，不是共价化合物，故B错误； C．NaOH 和 K2SO4 均由离子键、极性键构成，均属于离子晶体，故C正确； D．NaHSO4加热融化阅读下面图表，回答53-55题。whoJimBillPeterwhereSanyaShanghaiBeijingWhen to goThe last week in SeptemberSaturday, October 1The first week in OctoberWith whomHis parentsHis friendsHis cousinWhat to doGo to the beach,go shoppingGo shopping, eat nice foodVisit the Great Wall, go fishing, climb a mountainHow longAbout a monthUntil October 8About two weeksHowTaking a bus and walkingTaking a bus and a taxiTaking a bus and riding a bike【1】What’s Peter going to do for his vacation?A. Go swimming . B. Go shopping . C. Go fishing.【2】Who are going shopping for the vacation?A. Jim and Bill. B. Bill and Peter. C. Peter and Jim.【3】How long is Bill staying in Shanghai?A. For about two week. B. For about a week. C. For about a month.