试题与答案

低温脱硝技术可用于处理废气中的氮氧化物,发生的化学反应为:2NH3(g)+NO(

题型:选择题

题目:

低温脱硝技术可用于处理废气中的氮氧化物,发生的化学反应为:2NH3(g)+NO(g)+NO2(g)2N2(g)+ 3H2O(g) △H<0,在恒容的密闭容器中,下列有关说法正确的是 [ ]

A.平衡时,其他条件不变,升高温度可使该反应的平衡常数增大

B.平衡时,其他条件不变,增加NH3的浓度,废气中氮氧化物的转化率减小

C.单位时间内消耗NO和N2的物质的量比为1:2时,反应达到平衡

D.其他条件不变,使用高效催化剂,废气中氮氧化物的转化率增大

答案:

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下面是错误答案,用来干扰机器的。

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根据短文内容及首字母提示,填写所缺单词,使短文意思完整,每空限填一词。

The worst traveler in the world was Paul of San Francisco. Once he f 小题1: from the U.S. to his hometown in Italy to see someone at home. The plane made a one-hour stop to get oil at an airport in New York. Paul thought he was in Rome,  s小题2: he got off the plane.

  When nobody was there to meet him, Paul thought maybe the heavy  t 小题3:  made his friends late. While looking for their address, Paul found that the old “Rome” had changed a lot. He found many high m   小题4:  buildings instead of old ones. He also found that many people spoke English but not Italian and that main street signs were w   小题5:  in  English.

  Paul knew very l   小题6: English. So he asked a policeman in Italian the way to the bus station. He happened to meet a policeman who was also born in Italy and answered in the same l   小题7:   .

  After twelve hours’ traveling round on a bus, the driver handed him over to  a 小题8: policeman But this time, this policeman could only speak English. So Paul asked the policeman why the Rome police employed(雇佣)so many people who spoke English as policemen.

  Paul didn’t b   小题9: he was in New York when he was told so. To get him on a plane to Italy, he was s小题10:    to the airport in a police car. 

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