问题 问答题 简答题

什么是干气、富气、贫气、液化气?

答案

参考答案:

通常将石油气体按其中碳三,碳四以上的重质气体含量多少公为三类;

(1)凡碳三,碳四以上的重质气体含量150克/立方米以上的油气称为富气

(2)含量在50克/立方米称为干气

(3)含量在50---150克/立方米称为贫气

(4)某些气体(碳三,碳四烃0在常温下成气态,而在低温高压下号液态,这种气体称为液化气。

完形填空
I wanted to be just like those big kids I saw wearing their medals and carrying their ribbons(绶带). So I____the cross­country team at my school.
However, I was very slow in the team. In races, I would finish almost____. I'd always have to____in the longer races.The__ __races and at least 100 people competing in it made me really____. Every time I stopped, 10 people would__ __me. But I still couldn't push myself to keep going, even though I____watching them go by me. After every race, I'd go home and burst into tears.
Then one of my friends joined the cross­country team, too. She never got tired and didn't get cramp(抽筋) in her legs. I just didn't understand how that was____! I'd been running much longer than she had, but she could run__ __while I had to suffer. She even came 8th in a big race with over 200 people in it! My____was lower than ever and I wanted to quit badly.
I didn't, ____. Even a whole month before a race, I'd get so nervous that I felt like I might give up. Still, I____to quit. I still had that____appearing in my mind and I hung on to it.
Finally, I realized the reason why the bigger races made me so nervous was that I was always worried that I wasn't____for them. I started to practice at home almost every day. I____a plan that had me running almost three kilometers every day, which helped me build up a steady____.
When the time came for the big race, all the practice really____. I stopped only once and my pace was much better.
I was____of myself for sticking with it even though it was really hard and I'd even wanted to quit. I showed myself that I was____enough to keep going. That was what made me feel good about myself and gave me confidence.
The next time I'm faced with a tough____, I will know that I can take it up. None of this would ever have happened if I had quitted!
小题1:
A.likedB.admiredC.supported D.joined
小题2:
A.bestB.firstC.lastD.least
小题3:
A.stopB.rest C.breathe D.suffer
小题4:
A.excitingB.tiring C.interesting D.disturbing
小题5:
A.nervous B.frightened C.sadD.angry
小题6:
A.help B.encourage C.leave D.pass
小题7:
A.missedB.hatedC.avoided D.escaped
小题8:
A.equal B.reasonable C.fair D.tolerable
小题9:
A.quicklyB.easilyC.happilyD.hopefully
小题10:
A.strength B.demand C.goalD.confidence
小题11:
A.yet B.eitherC.thoughD.still
小题12:
A.refusedB.decidedC.failedD.wanted
小题13:
A.lesson B.faithC.future D.picture
小题14:
A.suitable B.activeC.readyD.well
小题15:
A.took out B.mapped outC.figured outD.let out
小题16:
A.pace B.raceC.willD.level
小题17:
A.set off B.paid off C.got offD.took off
小题18:
A.sure B.awareC.proudD.afraid
小题19:
A.strongB.patientC.steady D.devoted
小题20:
A.jobB.sport C.competitionD.challenge
单项选择题