(6分)某温度时,在容积为2L的密闭容器中,三种气体物质的量随时间的变化曲线如图

题型:填空题

问题:

(6分)某温度时,在容积为2L的密闭容器中,三种气体物质的量随时间的变化曲线如图所示。请根据图中数据作答。

①列式计算在2分钟内X的化学反应速率              

②写出该反应的化学方程式                         

③达到平衡时,Y的转化率为            

考点:化学平衡的有关计算影响化学平衡的因素达到化学平衡的标志化学平衡常数
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Mr. Smith  36  from London. Now he is in China. He is   37  .He teaches  38  a middle school. He works very hard. His students like  39  very much. He can   40  a little Chinese. His students often teaches him Chinese  41  Sundays. Mr. Smith likes playing football . He often plays football  42  his students.
Mr Smith  43  a son. His name is Jack. He is a student. He studies in a middle school. He goes to school   44  bike everyday. He gets back home at four in the afternoon. He likes  45  TV in the evening.
小题1:
A.comeB.comesC.areD.coming
小题2:
A.a teacherB.a workerC.a driverD.a farmer
小题3:
A.onB.inC.toD.from
小题4:
A.heB.himC.sheD.her
小题5:
A.sayB.speakC.talkD.tell
小题6:
A.atB.onC.ofD.in
小题7:
A.forB.toC.withD.at
小题8:
A.hasB.haveC.there isD.there are
小题9:
A.onB.byC.inD.of
小题10:
A.seeingB.lookingC.watchingD.looking at
题型:填空题

20世纪70年代,西亚产油国经济发展的关键因素是             (   )

A.增加石油开采量

B.冲破国际石油垄断资本的控制

C.积极发展石油化学工业

D.改善农业环境,提高粮食自给率

题型:填空题

某天然地基土体不排水抗剪强度cu为23.35kPa,地基极限承载力等于5.14cu,为120kPa。采用碎石桩复合地基加固,碎石桩极限承载力可采用简化公式估计,ppf=25.2cu;梅花形布桩,桩径为0.80m,桩中心距为1.40m。设置碎石后桩间土不排水抗剪强度为25.29kPa。破坏时,桩体强度发挥度为1.0,桩间土强度发挥度为0.8。由此,碎石桩的极限承载力为()。

A.ppf=588kPa

B.ppf=613kPa

C.ppf=637kPa

D.ppf=490kPa

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井底车场与井口之间,不得装设直通电话。

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地形差异大的地区,同一压力系统的油藏,其压力梯度(),压力系数()。

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