问题 填空题

Na2CO3俗称纯碱,是一种白色粉末,可以跟CO2和H2O反应生成NaHCO3,该反应的化学方程式为_________________;Na2CO3与稀盐酸反应放出CO2,但实验室却不用这个反应制备CO2,其主要原因可能是____________________;已知Na2CO3的溶解度比NaHCO3大,那么在饱和的Na2CO3溶液中连续通入CO2,可观察到的现象是_______________。

答案

Na2CO3+CO2+H2O==2NaHCO3;Na2CO3与稀盐酸反应速度太快,产生的CO2不易收集;溶液变浑浊(或有晶体析出)

完形填空

Do you remember last summer , when angry travelers were urging the government to do something about airline customer service ? Airlines     36     to improve , and they adopted (采用)new standards just before Christmas .    37     as another summer nears , plenty of     38    

travelers don’t see much improvement in customer     39     overall .

This month , the Department of Transportation’s (DOT) office will publish its first critical   40      

on whether airlines are     41     their promises . One survey(调查)suggests problems : the number of     42     to the DOT about the top 10 airlines in the first     43     rose 89% from a year ago .

Hit last summer by passenger complaints  and the threat (威慑)of consumer-protection laws by the    44      , 14 airlines     45     to adopt a set of basic customer-service standards called Customers First . The “12 promises” to passengers were introduced     46     a mjor effort to improve service . Since then , airlines have been redesigning websites , retraining employees and upgrading technology .

Recently , DOT inspector general Kenneth Mead , at McCain’s request , sent 20 examiners to airports to     47     whether each airline is doing what it promised . Mead warns travelers shouldn’t    48      too much . Most of the promises are    49      better communication with customers , not problems with flights .

“Passengers should show more understanding to airlines about their     50     to better air service .” Spokeswoman Shelly Sasson says . “And when     51     are made , it takes a long time for them to be noticed,” she says .

Now , the efforts may be working . During the first quarter , Delta had the second-lowest rate of complaints among the     52     10 carriers .    53     , its rate , along with other carriers’ , is up from last year . McCain and other lawmakers say there may be  a     54     to pass new consumer-protection      55    .

36.A.promised                      B.managed                C.hoped                    D.refused

37.A.So                         B.But                        C.Merely                   D.Even

38.A.skilled                   B.experienced            C.tired                             D.puzzled

39.A.flight                     B.opinion                  C.service                   D.travel

40.A.news                     B.information            C.doubt                     D.article

41.A.honoring                B.making                  C.giving                    D.improving

42.A.problems                      B.travelers                 C.passengers              D.complaints

43.A.quarter                  B.year                       C.month                    D.summer

44.A.customer                B.company                C.government            D.public

45.A.wished                   B.agreed                    C.remembered           D.failed

46.A.to                          B.for                        C.as                          D.by

47.A.explain                   B.discuss                    C.discover                 D.check

48.A.travel                    B.expect                    C.complain                D.suggest   

49.A.aimed at                B.considered as          C.joined to                D.made from

50.A.difficulty                      B.situation                 C.reality                    D.efforts

51.A.suggestions            B.rules                      C.decisions                D.improvements

52.A.large                     B.first                       C.top                        D.bad

53.A.Still                       B.Therefore                C.Instead                   D.Meanwhile

54.A.possibility              B.need                      C.chance                   D.use

55.A.examinations          B.service                   C.laws                      D.reports

单项选择题

定金是签订合同的一方的当事人,为了证明合同的成立和担保合同的履行,依照法律规定或约定,在应该给付的款项内预先向另一方交付的一定金额。根据上述定义,下面哪一种情况属于定金( )

A.李某做钢材生意,这段时间钢材非常紧俏,物资公司还要求用现金去提货,而且交款的当时是取不到货的。这次他要购买5吨螺纹钢,按照定价他交了14 000元,直到一个月以后,他才取到所需的钢材。

B.齐齐哈尔市的风华公司向内蒙古深达公司订购了38吨牛肉,由于买卖做得很大,深达是一个小公司,它的周转资金不够,难于收购到所需数量的牛肉,考虑到深达公司的实际情况,为了尽快把生意做成,风华公司给深达公司预先支付了5万元。

C.昌海公司与智明油厂签订了一份产销色拉油的合同,合同规定智明油厂应该在合同签订后5个月内供给昌海公司80吨优质色拉油。在此期间,智明油厂发生了机械事故,致使该厂停产3个月。由于不能按期交货,智明油厂按合同规定给昌海公司赔款3万元。

D.安泰贸易公司的副总经理在一次订货会上与某印染厂签订了一份购销亚麻丝的合同,合同总金额达780万元,根据双方的协定,印染厂应按合同金额的30%付给安泰贸易公司234万元作为履行合同的诚意,但印染厂资金非常紧张,一时拿不出这么多钱,东拼西凑地付了200万元。