问题 选择题

每个人都要有安全意识。下列说法中,正确的是

A.电器起火时,先用水扑灭

B.乘坐地铁时,可以携带鞭炮

C.进入久未开启的菜窖前,先做“灯火试验”

D.厨房里液化气大量泄漏时,立刻打开抽油烟机排气

答案

答案:C

题目分析:根据安全常识进行分析判断。

A、电器着火时,直接用水灭火会引起触电,应先关闭电源,故A错误;

B、易燃易爆品引燃后会对人身和财产造成危险,乘坐地铁时,不能携带鞭炮,故B错误;

C、进入久未开启的菜窖,需要用点燃的蜡烛等,做“灯火实验”,若火焰熄灭或燃烧不旺,说明二氧化碳含量较高,不宜立即进入菜窖,故C正确;

D、液化气是易燃易爆物,接触明火或电火花等吗,有可能会爆炸,而打开抽油烟机会产生电火花,故D错误。故选C

点评:关注生命安全是当今社会的热点,也是化学考查的重点,所以在平时的学习过程中,要注意积累相关方面的知识,特别是生产、生活中易燃易爆物的安全问题等。

完形填空
One Monday morning, the class were excited about the rumor(流言)that the science room was on fire over the weekend.Mr. Johnson, my fifth grade teacher  36  it and explained that science class would be cancelled  37  the fire. He also  38  us not to go near the room because it could be dangerous.
During the morning break, Kim and I  39  to check out the damage.A first hand observation would make us heroes at lunch.We safely  40  the science room.We stood on tiptoes(脚尖)looking hard through the door window, trying to see what was like inside  41  suddenly a firm hold on our shoulders stopped us.
"Where do you belong? Certainly not here!"
I turned around to find a teacher staring  42  at us, shouting.In those frozen seconds millions of  43  flashed through my mind.My father would kill me for disobeying teachers.Worse than that, my mother might be so mad that she might not  44  him.My heart  45  even lower when I thought of how angry Mr.Johnson would be.Soon the teacher led Kim and me back to the classroom, leaving us  46  before Mr.Johnson.
But to our  47  , there was no yelling and no anger from Mr.Johnson. 48  , he bent slowly to look me in the eye.I was met with a look of  49  rather than anger.He spoke softly and carefully as he explained why he was  50  in my decision to go where I might have got  51 .As I looked into the eyes of the man who could send me to unimagined  52  at home, tears welled up in my eyes.The thought of disappointing Mr.Johnson  53  me while I felt a gentle touch of Mr.Johnson's hand on my shoulder.I glanced up and he smiled.My  54  for Mr.Johnson grew greatly the moment I discovered that he still liked me even after I'd disappointed him.I could see that he cared more about my  55  than the fact that I'd broken a rule.It was the first time I felt the power of forgiveness.
小题1:
A.heardB.believedC.confirmedD.studied
小题2:
A.due to B.despiteC.in terms ofD.other than
小题3:
A.remindedB.warnedC.informedD.convinced
小题4:
A.pretendedB.askedC.decidedD.promised
小题5:
A.enteredB.foundC.examinedD.reached
小题6:
A.asB.whenC.whileD.since
小题7:
A.angrilyB.patientlyC.silentlyD.curiously
小题8:
A.excusesB.thoughtsC.wordsD.feelings
小题9:
A.helpB.hateC.stopD.seize
小题10:
A.flewB.sankC.beatD.moved
小题11:
A.whistlingB.chattingC.whisperingD.shaking
小题12:
A.surpriseB.delightC.regretD.sorrow
小题13:
A.HoweverB.ThereforeC.OtherwiseD.Instead
小题14:
A.comfortB.guiltC.concernD.complaint
小题15:
A.frightenedB.puzzledC.discouragedD.disappointed
小题16:
A.hurtB.burntC.lostD.blamed
小题17:
A.consequencesB.destructionsC.influencesD.surroundings
小题18:
A.shockedB.shamedC.boredD.confused
小题19:
A.careB.hopeC.desireD.love
小题20:
A.safetyB.freedomC.dignityD.behaviour
填空题