题目

（4分）用热水配制Al2(SO4)3溶液，出现浑浊现象，原因是                                 。要消除浑浊现象，又不污染药品，可加入适量的__________溶液。 答案：Al3++3H2OAl(OH)3+3H+，（写成化学方程式也可以）(2分)该反应吸热，加热，平衡向生成Al(OH)3的方向移动而变浑浊(1分)； 硫酸溶液 (1分)A young man was getting ready to graduate from college. For many months he had loved a beautiful sports car in a dealer’s showroom, and knowing his father could well 1 it, he told him that was all he wanted.As 2 drew near, the young man expected 3 that his father had bought the car. Finally, on the morning of the special day, his father called him into his study. His father told him how 4 he was to have such a fine son, and how much he loved him. He handed his son a beautiful wrapped (包装好的) gift box. Curious, but a little bit 5, the young man opened the box and found a lovely Bible (圣经).Angrily, he raised his 6 to his father and said, “Is a Bible 7 you can give me with all your money?” He then stormed out of the house, leaving the Bible.Many years 8 and the young man was very successful in business, but 9 his father was very old, he thought perhaps he 10 go to see him. He had not seen him since that graduation day. 11 he could make the arrangements (安排), he received a telegram which 12 him of his father’s death, and all the possessions (财产) willed (立遗嘱) to him. 13 arriving at his father’s house, sudden sadness and regret filled his heart. He began to 14 through his father’s important papers and saw the still new Bible, just as he had 15 it years ago. With tears, he opened the Bible and began to 16. As he was reading, a car 17 dropped from the back of the Bible.How many times do we 18 blessings (祝福) because they are not wrapped as we expected? Do not spoil (搞糟) what you have by desiring (渴求) what you have not; but remember what you now have was once 19 the things you hoped for. What may appear as bad fortune (运气) may 20 be the door that is just waiting to be opened.1.A.offerB.payC.buyD.afford2.A.his birthdayB.graduation dayC.sports meetD.examination day3.A.signsB.notesC.warningsD.marks4.A.upsetB.crazyC.comfortableD.proud5.A.excitedB.disappointedC.worriedD.satisfied6.A.handB.headC.voiceD.sound7.A.allB.thatC.all whatD.that all8.A.pastB.goneC.passedD.spent9.A.learningB.realizingC.hearingD.understanding10.A.couldB.wouldC.shouldD.ought11.A.AfterB.BeforeC.SinceD.Until12.A.informedB.requiredC.reportedD.introduced13.A.ByB.OnC.AsD.At14.A.putB.pushC.searchD.pass15.A.keptB.boughtC.leftD.expected16.A.turn overB.turn onC.turn upD.turn down17.A.pictureB.modelC.keyD.toy18.A.missB.getC.forgetD.avoid19.A.ofB.amongC.betweenD.along20.A.surelyB.actuallyC.mainlyD.naturally