试题与答案

两种大气污染物NO2和SO2在一定条件下可发生如下反应:NO2 + SO2NO

题型:选择题

题目:

两种大气污染物NO2和SO2在一定条件下可发生如下反应:NO2 + SO2NO + SO3,在体积为VL的密闭容器中通入amolNO2和bmolSO2,反应后容器内硫原子和氧原子的个数比为( )

A.

B.

C.

D.

答案:

答案:B

题目分析:根据质量守恒定律知,反应后容器内硫原子的物质的量n(S)=n(SO2)=bmol,氧原子的物质的量n(O)=2n(NO2)+2n(SO2)=2amol+2bmol,反应后容器内硫原子和氧原子个数比为,选B。

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题型:完形填空

第二节:完形填空(共20小题;每小题1.5分,共30分)

阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

One afternoon I toured an art museum while waiting for my husband to finish a business meeting.I was looking forward to a quiet   36   of the splendid artwork.

A young _37_ viewing the paintings ahead of me _38__ nonstop between themselves.I watched them a moment and decided the lady was doing all the talking.I admired the man's   39 for putting up with her  40   stream of words.  41   by their noise, I moved on.

I met them several times as I moved   42   the various rooms of art.Each time I heard her continuous flow of words, I moved away  43   .

I was standing at the counter of the museum gift shop making a   44   when the couple approached the   45 .Before they left, the man   46   into his pocket and pulled out a white object.He   47   it into a long stick and then   48   his way into the coatroom to get his wife's jacket.

"He's a   49   man, " the clerk at the counter said." Most of us would give up if we were blinded at such a young age.During his recovery, he made a promise his life wouldn't change.So, as before, he and his wife come in   50   there is a new art show."

"But what does he get out of the art?" I asked."He can't see."

"Can't see! You're   51 .He sees a lot.More than you and I do," the clerk said."His wife   52   each painting so he can see it in his head."

I learned something about patience,   53   and love that day.I saw the patience of a young wife describing paintings to a person without   54   and the courage of a'' husband who would not  55   blindness to change his life.And I saw the love shared by two people as I watched this couple walk away, their arms intertwined.

36.A.view        B.touch     C.wander    D.stare

37.A.lady           B.couple   C.man       D.clerk

38.A.yelled         B.argued         C.screamed     D.chatted

39.A.attempt        B.independence   C.patience       D.wisdom

40.A.constant       B.vivid    C.casual              D.vague

41.A.Adopted       B.Adapted       C.Disturbed     D.Conducted

42.A.from          B.to        C.towards       D.through

43.A.anxiously     B.quickly        C.urgently       D.sensibly

44.A.comment          B.purchase        C.decision        D.profit

45.A.exit          B.entrance   C.front    D.queue

46.A.plugged           B.reached  C.held     D.bent

47.A.lengthened          B.made       C.brought       D.broadened

48.A.led           B.found     C.tapped         D.forced

49.A.generous      B.rough         C.smart     D.brave

50.A.wherever        B.whatever      C.whenever          D.whichever

51.A.unique         B.silly     C.equal              D.wrong

52.A.decorates      B.draws          C.shoves        D.describes

53.A.kindness       B.pride          C.courage            D.enthusiasm

54.A.sight          B.support        C.expectation         D.confidence

55.A.get        B.allow    C.hope        D.cause

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