问题 填空题

随着经济的发展,能源与环境成为人们日益关注的问题。

(1)煤、________和__________常称为化石燃料。

(2)煤发电时,将煤块粉碎成煤粉,其目的是_____________________________________。

(3)化石燃料燃烧都会产生二氧化碳,它是空气中含量最多的温室气体,为减少它的排放,科学家致力研究将过多的二氧化碳和氢气在催化剂和加热的条件下反应,转化为水和甲烷,该反应的化学方程式为:

__________________________________。 

(4)下列措施中,有利于降低大气中的二氧化碳含量的是( )

A、大量使用化石燃料   B、植树造林,增大植被面积  C、将二氧化碳变废为宝,循环利用

答案

(1)吸附;(2)CO;(3)CaCO3+2HCl=CaCl2+H2O+CO2↑;(4)隔绝空气;(5)验纯;(6)铅笔芯中含有石墨,石墨具有润滑性;

(1)煤、天然气和石油常称为化石燃料.故填:石油.

(2)将煤块粉碎成煤粉,增大了煤与氧气的接触面积,使燃烧更充分.

故填:增大与氧气的接触面积,使煤燃烧更充分.

(3)二氧化碳和氢气反应的化学方程式为:CO2+4H2CH4+2H2O

(4)A、大量使用化石燃料,化石燃料燃烧生成二氧化碳,增加二氧化碳含量;

B、植树造林,增大植被面积,光合作用可把二氧化碳气体转变为氧气,消耗二氧化碳;

C.将二氧化碳变废为宝,循环利用,大量利用二氧化碳,降低二氧化碳含量;

完形填空
My son was badly hurt in a fire.After he__36__from a series of treatments,the doctors told him they would not do any operation for six months__37__it took long for the skin to stop shrinking (收缩). So, he had to return to college with a visible 10­inch__38__on his face.
I said to my son, “Keaston,__39__will pay any more attention to your scar__40__you do. If it does not bother you, it will not bother__41__.” He took my advice to heart and returned to school with his head__42__high—glad he was alive.
__43__, everyone has scars and shortcomings.Some of you may spend much time thinking that people would like you better, __44__you looked different, or dressed differently, or could have a different and newer__45__.
But you see, like Keaston’s scar,people will only judge you by your looks,or your__46__, or your car, if you are judging yourself by these same false__47__.
One of my friends in college was very__48__. At first, when people met him, they noticed his__49__for about 10 seconds. This man felt__50__about himself and spent most of his time__51__about other people’s comfort and welfare.__52__, people ignored his looks. What people__53__was his kindness and his concern for them. He didn’t act in an ugly way so people didn’t treat him as an ugly man.
Therefore, concentrate on what you value__54__yourself, because if you can see that beautiful person, everyone you are in contact with will see the same__55__.
小题1:
A.curedB.recoveredC.improvedD.returned
小题2:
A.becauseB.thoughC.untilD.before
小题3:
A.cutB.woundC.injuryD.scar
小题4:
A.no oneB.anyoneC.everyoneD.someone
小题5:
A.asB.likeC.thanD.when
小题6:
A.anotherB.othersC.allD.us
小题7:
A.putB.heldC.takenD.hung
小题8:
A.After allB.In conclusionC.In factD.Above all
小题9:
A.as long asB.ifC.even ifD.as if
小题10:
A.houseB.telephoneC.jobD.car
小题11:
A.clothesB.hairstyleC.figureD.salary
小题12:
A.meansB.standardsC.commentsD.rules
小题13:
A.smartB.optimisticC.rudeD.ugly
小题14:
A.mannersB.expressionsC.looksD.actions
小题15:
A.luckyB.worriedC.goodD.sad
小题16:
A.inquiringB.askingC.knowingD.caring
小题17:
A.CompletelyB.GraduallyC.ObviouslyD.Suddenly
小题18:
A.wantedB.understoodC.broughtD.saw
小题19:
A.withinB.beyondC.exceptD.above
小题20:
A.kindnessB.concernC.beautyD.perfection
单项选择题