关于下列图示装置的描述中，正确的是
① ② ③ ④
A．装置①中，c为阴极，d为阳极
B．装置②可用于实验室蒸馏石油
C．装置③中的X为CCl4时，可用于吸收氯化氢气体，并防止倒吸
D．装置④可用于收集氨气及并进行尾气吸收
CD
题目分析：A、根据电路方向可知a为正极，故c为阳极，A错误；B、蒸馏石油时温度计不能深入液面以下，B错误；C、HCl不溶于CCl4，可用该装置吸收HCl并可防止倒吸，正确；D、氨密度小于空气，用向下排空气法收集，且极易溶于水故用倒置的漏斗进行吸收尾气以防止倒吸，正确。
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| Dear Benter, You have been away exactly two weeks today but it seems more like two years to me! I'm glad to hear you'll be back soon. Are you coming directly home, dear? Or do you plan to make some stops 1 the way? I hope you'll be home in 2 for Patsy's birthday next Sunday. She is 3 you to show films to her 4 friends. Patsy keeps asking every day 5 you'll be back. She says you never 6 that story you were telling her about 7 train that lost its " toot" (喇叭嘟嘟声). You'd better 8 and think up a good ending 9 it. You know how Patsy is? She 10 be happy until she knows exactly what - 11 to the"toot" and 12 the little train got it back 13 ! Everything at home is fine except that we 14 you so much! I've been 15 with the spring cleaning. Yesterday I had Cora 16 in to wash the kitchen walls and she did a very good 17 of it. The kitchen looks as though it's been repainted. I made some new yellow curtains, and they 18 very beautiful. I went to see your mother yesterday. Her 19 is all gone and she looks very 20 . Your sister Jean looks wonderful! She has taken off about fifteen pounds since she began dieting. But now she's complaining that none of her clothes fit! Hope to see you before next Sunday. Love and kisses to you! Yours Lynn | ||||
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