题目

多项式4xy2–3xy3＋12的次数为（） A . 3 B . 4 C . 6 D . 7 答案：BScientists find that hard-working people live longer than average men and women. Career women are1than housewives．Evidence shows that 2  are in poorer health than the job-holders．A study shows that 3the unemployment rate increases by 1%，the death rate in-creases correspondingly by 2%．All this comes down to one point：Work is helpful to health．Why is work good for health? It is because work _4people busy,  5 loneliness and  solitude . Researches show that people feel unhappy，6nd lonely when they have nothing to do．Instead，the happiest are those who are  7．Many high achievers who love their careers feel that they are happiest when they are working hard . Work serves as 8  between man and reality．By work，people9  each other．By collective activity，they find friendship and warmth．This is helpful to health．The loss of work 10 the loss of everything．It affects man spiritually and _11  him liable to disease．12 ，work gives one a sense of fulfillment and a sense of 13 ．Work makes one feel his value and status in society．When 14finishes his writing or a doctor successfully 15  a patient or a teacher sees his students 16 ，they are happy _17． From the above we can _18o the conclusion that the more you work, 19 and healthier you will be．Let us work hard，study well and _20 a happy and healthy life．1.A.richerB.weakerC.healthierD.wors2.A.the oldB.the busyC.the hard-workingD.the jobless3.A.whetherB.wheneverC.thoughD.since4.A.forcesB.keepsC.needsD.require5.A.away fromB.in lack ofC.in touch withD.in charge of6.A.worriedB.joyfulC.concernedD.interested7.A.freeB.busyC.lazyD.dull8.A.a bridgeB.a gapC.a channelD.a guard9.A.come acrossB.look down uponC.come into contact withD.watch over10.A.standsB.meansC.helpsD.matches11.A.makesB.ordersC.findsD.forces12.A.ThenB.BesidesC.HoweverD.Yet13.A.disappointmentB.regretC.achievementD.apology14.A.a workerB.a farmerC.a managerD.a writer15.A.makes friends withB.has a talkC.deals withD.operates on16.A.raiseB.riseC.growD.increase17.A.beyond wordsB.without a wordC.at a wordD.in a word18.A.reachB.comeC.arriveD.draw19.A.the happierB.the weakerC.the strongerD.the lonelier20.A.makeB.leadC.earnD.share