英语周报课标HZ2022-2022答案

第一节【参考范文】Dear annieIm Li Hua. Hows everything going these days? I'd like to ask you to write an article for our schools English newspaperThe"Culture field "section is very popular among us students. And here are some relevant details about the articles we areeager for. Would you please write something about how Americans spend their holidays and festivals, which is interesting andinformative? 400 words would be fine. Could we have your article before June 10?I'm looking forward to your replySincerely yoursLi Hua

12,C【解析】由图可知,0.1mol·LHx溶液中Hlg coh12,故c(H)=0.1mol·L1,HX为强酸,同理推知,HY为弱酸,A项错误;点溶液中水电离出的c(H)=c(OH)=10-日moL-1,B项错误re点为等物质的量浓度的IY和NaY的混合溶液,lgc(OH=6,故c(H)=10-mol·L,溶液量酸性,说明HY的电离程度大于NaY的水解程度,故c(Y)>c(HY),C项正确:b点时,n(NaOH0.008mo,而n(HY=0.01ml,HY过量,D项铅误。

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