问题 选择题

在下列有关碳酸的盐溶液的说法中,不正确的是

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A.在溶质物质的量相等的Na2CO3、NaHCO3两溶液中,阴离子总数相等

B.常温下,等物质的量浓度的Na2CO3溶液的pH大于NaHCO3 溶液的pH

C.在NaHCO3溶液中一定有:c(Na+)>c(HCO3-)>c(OH-)>c(H+)

D.在Na2CO3溶液中一定有:c(Na+)+c(H+)=c(HCO3-)+ c(OH-)+ 2c(CO32-)

答案

答案:A

完形填空

The British love to think of themselves as polite and everyone knows how fond they are of their “pleases"and “thank yous".Even the simplest business such as buying a train ticket requires__65 seven or eight of these.Another __66  of our good manners is the queue.Newcomers to Britain could be forgiven for thinking that queuing rather than football was the__67 national sport.Finally,of course,motorists generally stop at crossings.But does all this mean that the British should consider themselves more polite than their European neighbours?I think not.

Take forms of address (称呼)for example.The average English person__68   he happens to work in a hotel or department store—would rather die than call a stranger “Sir" or“Madam".Yet in some European countries this is the most basic of common address.Our __69 “you" for everyone may appear more democratic,but it means that we are forced to seek out complicated ways to express __70  .I am all for returning to the use of “thee"and “thou"(Thee and thou are oldfashioned poetic words for“you");“you" would be__71  for strangers and professional relationships.

And of course,the English find touching and other shows of friendship truly terrifying.Have you noticed how the British __72  ever touch?Personlly, I find the Latin habit of shaking hands or a friendly kiss quite charming.Try kissing the average English person,and they will either take two steps backwards in horror;or,if their escape is__73  ,you will find your lips touching the back of their head.Now what could be__74 than that ?        

65.A.at least          B. at most         C. less than         D. not more than

66.A.signal            B. scene           C. sign              D. sight

67.A.true              B. original       C. superior          D. advanced

68.A.if                B. whether         C. when              D. unless

69.A.universal         B. unique          C. regular           D. normal

70.A.politeness        B. gratitude       C. democracy         D. consideration

71.A.ordered           B. reserved        C. offered           D. stocked

72.A.highly            B. mostly          C. hardly            D. nearly

73.A.confirmed         B. assured         C. jammed            D. blocked

74.  A. better         B. ruder           C. more polite        D. more frightening 

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