题目

既能跟稀硫酸反应又能跟熟石灰反应的物质是 () A． 硫酸铜 B． 碳酸钠 C． 氢氧化钠 D． 碳酸钙 答案：B【详解】 熟石灰为 Ca(OH)2 ，则： A、 CuSO4 只能和熟石灰反应， A不符合题意； B、 Na2 CO3 既能跟稀硫酸反应又能跟熟石灰反应， B符合题意； C、 NaOH只能和稀硫酸反应， C不符合题意； D、 CaCO3 只能和稀硫酸反应， D不符合题意； 故选 B。完形填空： 阅读下面短文，完成文后题目。 　　Several days ago I met a stranger in the street who stopped and asked me directions. I 1 to show him the way to his destination(目地的) but to my 2 , he coldly refused my offer. I asked him 3 . Finally he told me that he was afraid I would ask him for money if I 4 in this way. 　　Money! I 5 deep into thought. Is it money that comes 6 us now? Money has no 7 ; it cannot be judged to be good or bad. The problem 8 what attitude(态度) we have towards it. 　　At present, we have a more 9 material life than ever before, but we're 10 more and mare coldblooded. Why? In my opinion, the 11 is the change in people's personal value. They wrongly believe that 12 money should be their only aim in life, so they 13 all sorts of ways they can to 14 this aim They are afraid of being 15 and fooled. If everyone 16 like this, what will our society be like? 　　Needless to say, money is becoming more and more 17 in our society, but it should not be the“beall and endall”(最重要的事) of life. If a person only concentrates on (专心于) 18 , he will be lonely and void(空虚), and even go astray(歧途). 　　It is 19 to us to make our lives happy, not money. We should try cur best to help others 20 and freely. If everyone does so, society will be better and better. 1． [　　] A．advisedB．offered C．askedD．wished 2． [　　] A．joyB．fear C．excitementD．surprise 3． [　　] A．whyB．how C．whatD．where 4． [　　] A．stoppedB．asked C．toldD．assisted 5． [　　] A．fellB．felt C．keptD．caught 6． [　　] A．betweenB．with C．upD．to 7． [　　] A．problemB．price C．lifeD．use 8． [　　] A．wipes offB．takes back C．smooths awayD．lies in 9． [　　] A．powerfulB．beautiful C．plentifulD．healthy 10． [　　] A．feelingB．becoming C．touchingD．doing 11． [　　] A．keyB．money C．creatureD．man 12． [　　] A．takingB．accepting C．makingD．spending 13． [　　] A．think upB．pick up C．give offD．break out 14． [　　] A．realizeB．recognize C．shootD．wipe 15． [　　] A．foundB．discovered C．cheatedD．followed 16． [　　] A．worksB．does C．learnsD．acts 17． [　　] A．importantB．useless C．seriousD．difficult 18． [　　] A．lifeB．others C．societyD．money 19． [　　] A．upB．on C．forD．down 20． [　　] A．separatelyB．obviously C．wholeheartedlyD．mainly