2022年衡中同卷 信息卷 新高考 语文(三)3试题 答案

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8.【答案】(1)冷凝回流，提高原料的利用率(2分)a(1分)(2)○ B,Br HBr(2分)(3)浅黄色沉淀(1分)吸收可能挥发出的Br,防止其干扰D中实验（或其他合理说法，2分）78a(4)①除去FeBr3(1分)除去残留的NaOH溶液(1分)②苯、二溴苯(2分)157×17.6100%(2分)【解析】(1)苯与溴单质间的反应是放热反应，苯与溴均易挥发，故X的作用是使气化的苯、溴冷凝回流到容器中继续反应，从而提高原料的利用率。冷却水从a口进人。(3)若B中发生取代反应，则会有HBr生成，HBr进人D中会有浅黄色沉淀生成，由于B中有可能挥发出B,而B,也能与上述试剂反应，故C的作用是吸收可能挥发出的Br2,防止其干扰实验。(4)①用稀盐酸洗涤是除去易溶于水的FeBr,。水洗的目的是除去残留的NaOH溶液。②蒸馏78是为除去苯、二溴苯。苯的质量为17.6g,由方程式知，得到ag溴装时需要消耗57g的苯，故装的利用率为7号g÷17.6g=15717.678a×100%。

第一节One possible versionDear Sir/MadamKnowing the International Book Fair will be held nextweek in our city and that some volunteers are needed. I amwriting to recommend myselfThe following are my advantages. First of all, I speakEnglish so fluently that I have no difficulty communicatingwith foreigners. Secondly, as a monitor, I always organizeall kinds of social activities. More importantly, I am a reg-stered volunteer, so I have gained rich experience in volentering.I would appreciate it if I were given a chance. Lookingforward to your early reply.Yours.Li Hi第二节One possible versionLater that evening, my son came up to me, his handbehind his back. "I have something for you, Daddy, "hesaid. Beyond my expectation, he handed me a KenGriffey, Jr. card. He'd taken a pair of scissors and cutone copy of the Griffey off from the box. Now you don'thave to look for it anymore, "he said. Hearing what hesaid,I was shocked, and moved to tears. At once, the hugI gave him was the best price I ever paid for a cardI continued collecting, and even ended up buying andselling some old and valuable cards. However, there wasone card that I would never trade, which was a KenGriffey, Jr. card. Up to now, I still keep that Griffey, Jrcard, even if it has had the rough borders and the shabbycorners, and there is only a plain and simple board on theback. That is because that card. to me, is what baseball isall about. More importantly, it's also what loveall about