问题 单项选择题

具有自然通风的单层建筑物,所散发的可燃气体密度小于室内空气密度时,宜设置事故( )。

A.排风系统
B.送风系统
C.净化系统
D.防爆系统

答案

参考答案:B

完形填空
A little boy almost thought of himself as the most unfortunate child in the world because a disease made his leg lame. He ____ played with his classmates. When the teacher asked him to answer questions, he always ____ his head without a word.
One ____ the boy's father asked for some saplings (树苗) from the neighbor. He wanted the ____ to plant a sapling each person in front of the house. The father said, “Whose sapling grows best, I will buy him or her a favorite ____.” Seeing his brothers and sisters watering the trees, however, the boy had an idea. He hoped that the tree he planted would ____ soon. So, after watering it once or twice,he never ____ it.
A few days later, when the little boy went to see his tree again, he was ____ to find that it didn't wilt (枯萎) but grew some fresh leaves. ____ the trees of his brothers and sisters, his tree was even greener. His father kept his ____, bought the little boy his favorite gift and said that from the tree he planted, he would become an outstanding ____ when he grew up.
Since then, the little boy slowly became ____. One night, he lay on the bed but could not sleep. Then he got up and came to the ____. To his surprise, his ____ was splashing something onto his tree.____, he understood—his father had been ____ fertilizing his small tree!
He returned to his room,____ running down.
____ passed. The little boy didn't become a botanist, but he was elected President of the United States. His name was Franklin Roosevelt.
Love is the ____ nourishment (营养) of life. ____ it is just a drop of clear water, it can still help the tree of life thrive (茁壮成长).
小题1:
A.bravelyB.seldomC.freelyD.always
小题2:
A.raisedB.noddedC.loweredD.knocked
小题3:
A.springB.momentC.winterD.week
小题4:
A.neighborsB.friendsC.childrenD.boys
小题5:
A.saplingB.treeC.giftD.toy
小题6:
A.dieB.growC.breakD.survive
小题7:
A.led toB.attended toC.belonged toD.objected to
小题8:
A.pleasedB.upsetC.worriedD.surprised
小题9:
A.Compared with B.Similar toC.Connected toD.Popular with
小题10:
A.requestB.scheduleC.promiseD.secret
小题11:
A.presidentB.botanistC.artistD.researcher
小题12:
A.smartB.desperateC.optimisticD.practical
小题13:
A.fieldB.courtyardC.parkD.farm
小题14:
A.brotherB.sisterC.fatherD.neighbor
小题15:
A.All of a suddenB.For a momentC.In timeD.From then on
小题16:
A.busilyB.quietlyC.cautiouslyD.secretly
小题17:
A.waterB.tearsC.sweatD.rain
小题18:
A.HoursB.MonthsC.DecadesD.Centuries
小题19:
A.lastB.onlyC.leastD.best
小题20:
A.Even ifB.Now thatC.If onlyD.What if
单项选择题