题目

化学与生产、生活密切相关。下表中物质在生产、生活中的应用及解释均正确的是（） 选项应用解释 A75%的酒精可用于皮肤消毒酒精具有强氧化性 BKIO3应用于制加碘食盐KIO3可补充人体缺少的碘元素 C高铁车厢采用铝合金材料铝化学性质稳定，难与氧气反应 D高纯硅作计算机芯片的材料硅晶体在自然界中能稳定存在 A . A B . B C . C D . DWhen I was growing up, I had an old neighbor named Dr. Gibbs. He didn’t look like any doctor I’d1known. When Dr. Gibbs wasn’t2lives, he was planting trees. The good doctor had some3theories on planting trees. He believed in “No pains, no gains”. He never4his new trees, which was5many people. Once I asked why. He6that watering plants spoiled them, and that if you water them, each following tree generation will7weaker and weaker. So you have to make things8for them. He talked about how watering trees9shallow roots, and how trees that weren’t watered had to grow deep roots in10of water. I came to understand that he meant deep roots were to be11. I planted a couple of trees a few years back and I took good care of them. Two years of12has resulted in trees that expect to be waited on hand and foot. Whenever a cold wind blows, they13and tremble their branches. Funny things about those trees of Dr. Gibbs’. The lack of water seemed to14them in ways comfort and ease never could. I used to15for my sons that their lives will be easy. But16I’ve been thinking that it’s time to17my prayer. I know my children are going to meet18, and I’m praying they will be strong. The prayer for comfort is seldom met. What we need to do is to pray for deep roots,19when the winds blow, we won’t be20away. 1.A.evenB.everC.neverD.hardly2.A.valuingB.makingC.enjoyingD.saving3.A.excitingB.dullC.interestingD.terrible4.A.wateredB.raisedC.lovedD.sheltered5.A.againstB.beyondC.withinD.from6.A.wonderedB.answeredC.doubtedD.guessed7.A.growB.changeC.appearD.show8.A.harmfulB.favorableC.toughD.wonderful9.A.made forB.headed forC.allowed forD.cared for10.A.chargeB.favorC.honorD.search11.A.treasuredB.challengedC.respectedD.liked12.A.educationB.informationC.preparationD.devotion13.A.danceB.shakeC.spreadD.lift14.A.harmB.raiseC.benefitD.hurt15.A.prayB.applyC.standD.call16.A.perfectlyB.formallyC.obviouslyD.lately17.A.attendB.sayC.changeD.keep18.A.hardshipsB.worriesC.bossesD.jobs19.A.orB.soC.andD.but20.A.givenB.sentC.brokenD.swept