配制碱性电解液时,氢氧化钾与蒸馏水的重量比应为()。A、1:1 B、1:2.2 C、 发布时间:2017-05-08 17:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: 配制碱性电解液时,氢氧化钾与蒸馏水的重量比应为()。A、1:1B、1:2.2C、1:2.5D、1:3
题型:单项选择题 Water is the _____ of all the things we eat and drink. Not many people understand this but ______ quite true. The human body can go without _____ for a long time. We’ve got many examples for this. Yet two _____ three days without water can usually make people ______. Man can’t live ______ water.Many people don’t understand how _____ water the human body needs _____ work well, and many people, especially young people, do not drink enough, _____ in very hot weather. Our body has mostly water, about 65% to 75%. That is to say about two thirds of our body is water. When we do sports, some of the water will get away from our body. ___ we don’t drink some water, we won’t have enough water. And if we don’t have enough water, we’ll feel tired and many of us will get ill. So you know how important water is to us.小题1:A.importantB.most importantC.more importantD.differe nt小题2:A.it’sB.itsC.itD.is小题3:A.foodB.waterC.drinkD.meat小题4:A.soB.AndC.ButD.or小题5:A.to dieB.dieC.to diedD.died小题6:A.haveB.withC.withoutD.in小题7:A.manyB.muchC.littleD.few小题8:A.andB.theC. /D.to小题9:A.evenB.everC.almostD.hardly小题10:A.IfB.ForC.SinceD.Because 查看答案
题型:单项选择题 把0.05 mol NaOH固体分别加入到100 mL下列液体中,溶液的导电能力变化最小的是( )A.自来水B.0.5 mol·L-1的盐酸C.0.5 mol·L-1的 CH3COOH溶液D.0.5 mol·L-1的KCl溶液 查看答案