题目

下列有关利用乙醛制备银镜过程的说法不正确的是（ ） A . 边振荡盛有2%的AgNO3溶液的试管，边滴入2%的氨水至最初的沉淀恰好溶解为止 B . 将几滴银氨溶液滴入2 mL乙醛中 C . 将盛有乙醛与银氨溶液混合液的试管置于热水浴中加热 D . 在银氨溶液的配制过程中溶液pH增大 答案：BI spent my last Christmas Day working the whole day!Due to the nature of my job, I had to go back to my 1 and spent my whole Christmas Day there. Of course, It 2 no good! Surely you will get 3 when almost all of your friends are either resting at home, watching TV, listening to music, 4 watching movies in the cinema, and you are the only one that is not 5. The feeling is really bad. And I really did not feel like 6 and going to work in the morning. But I 7 went to work. I am a responsible guy. Since the arrangement was like that, I 8.Of course, there is something 9 about working on Christmas Day and most public 10. First of all, since I had no plan to go out, or do any 11 activities on that day, I most likely would 12 the day at home playing computer games, so why not go to work and 13 some extra money? It makes sense to me. Besides, it is a holiday for 14 the whole world. It 15 most of my company’s offices in other 16 would probably not be working, 17 those in China, Japan and Thailand as Christmas is not a holiday for people there. Less users, less problems, meaning? Less 18 for us to do. And the best part is, the office is ours! I can 19 my laptop to the office, watch movies, play games, and at the same time, get my extra 20! Well, what do you think of working on holidays?1.A.homeB.studyC.officeD.town2.A.madeB.feltC.keptD.did3.A.sadB.strangeC.stupidD.interesting4.A.orB.andC.soD.but5.A.watchedB.employedC.missedD.included6.A.keeping offB.falling behindC.getting upD.running away7.A.alsoB.alwaysC.evenD.still8.A.experiencedB.acceptedC.dislikedD.changed9.A.importantB.goodC.differentD.funny10.A.placesB.toursC.jobsD.holidays11.A.otherB.dangerousC.uselessD.simple12.A.startB.valueC.spendD.afford13.A.payB.stealC.saveD.make14.A.almostB.hardlyC.onlyD.exactly15.A.explainsB.meansC.readsD.tells16.A.villagesB.countriesC.citiesD.buildings17.A.afterB.withC.exceptD.as18.A.workB.talkC.homeworkD.cleaning19.A.throwB.postC.bringD.pull20.A.funB.roomC.serviceD.pay