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【简答题】
Given the advantages of electronic money, you might think that we would move quickly to the cashless society in which all payments are made electronically. 1 a true cashless society is probably not around the corner. Indeed, predictions have been 2 for two decades but have not yet come to fruition. For example, Business Week predicted in 1975 that electronic means of payment would soon "revolutionize the very 3 of money itself," only to 4 itself several years later. Why has the movement to a cashless society been so 5 in coming? Although electronic means of payment may be more efficient than a payments system based on paper, several factors work 6 the disappearance of the paper system. First, it is very 7 to set up the computer, card reader, and telecornmunications networks necessary to make electronic money the 8 form. of payment Second, paper checks have the advantage that they 9 receipts, something thai many consumers are unwilling to 10 . Third, the use of paper checks gives consumers several days of "float" - it takes several days 11 a check is cashed and funds are 12 from the issuer&39;s account, which means that the writer of the check can cam interest on the funds in the meantime. 13 electronic payments arc immediate, they eliminate the float for the consumer. Fourth, electronic means of payment may 14 security and privacy concerns. We often hear media reports that an unauthorized hacker has been able to access a computer database and to alter information 15 there. The fact that this is not an 16 occurrence means that dishonest persons might be able to access bank accounts in electronic payments systems and 17 from someone else&39;s accounts. The 18 of this type of fraud is no easy task, and a new field of computer science is developing to 19 security issues. A further concern is that the use of e lectronic means of payment leaves an electronic 20 that contains a large amount of personal data. There are concerns that government, employers, and marketers might be able to access these data, thereby violating our privacy. 1 A.However B.Moreover C.Therefore D.Otherwise 2A.off B.back C.over D.around 7A.imaginative B.expensive C.sensitive D.productive 8A.similar B.original C.temporary D.dominant 9A.collect B.provide C.copy D.print 10A.give up B.take over C.bring back D.pass down 11A.before B.after C.since D.when 12A.kept B.borrowed C.released D.withdrawn 13A.Unless B.Until C.Because D.Though 14A.hide B.express C.raise D.ease 16A.unsafe B.unnatural C.uncommon D.unclear 17A.steal B.choose C.benefit D.return 18A.consideration B.prevention C.manipulation D.justification 6A.for B.against C.with D.on 20A.chunk B.chip C.path D.trail 15A.analyzed B.shared C.stored D.displayed 3A.power B.concept C.history D.role 19A.cope with B.fight against C.adapt to D.call for 5A.silent B.sudden C.slow D.steady 4A.reward B.resist C.resume D.reverse
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【简答题】N 表示的意义有 : 1 ; 2 。
【单选题】体外冲击波碎石治疗上尿路结石时,最适宜于结石小于
A.
5cm
B.
3cm
C.
2.5cm
D.
2cm
E.
1cm
【单选题】变压器带感性负载运行时,其电压变化率为【 】。
A.
△U<0
B.
△U=0
C.
△U>1
D.
0<△U<1
【单选题】动物的生长和发育是需要一定温度的,下列哪个说法是正确的:
A.
外界温度的高低直接决定了动物机体的体温,进而影响其生长发育
B.
当外界温度低于某一温度时,昆虫就停止生长发育,这一温度阈值称为发育起点温度
C.
动物的发育速度总是随环境温度的增高而加快的
D.
昆虫发育的有效积温是发育历期乘以发育期的平均温度,然后求和
【单选题】执行命令"INDEX ON 姓名 TAG index_name"建立索引后,下列叙述错误的是().
A.
表中记录按索引表达式升序排序
B.
此命令建立的索引是当前有效索引
C.
此命令所建立的索引将保存在IDX文件中
D.
此命令的索引表达式是"姓名",索引名是"index_name"
【单选题】执行命令“INDEX ON  姓名  TAG name”建立索引后,下列叙述错误的是(    )。
A.
此命令建立的索引是当前有效索引
B.
此命令所建立的索引将保存在.idx文件中
C.
表中记录按索引表达式升序排序
D.
此命令的索引表达式是“姓名”,索引名是“name”
【简答题】计算机中设置存储器,将二进制编码表示的计算步骤与数据一起存放在存储器中,机器一经启动,就能按照程序指定的逻辑顺序依次取出存储内容进行译码和处理,自动完成由程序所描述的处理工作,这就是( )原理。
【单选题】搜索留学学校专业及其申请信息的途径有()。
A.
留学中介机构网站
B.
各学校及其院校官网
C.
考试机构网站
D.
政府相关机构网站
【单选题】执行命令“ INDEX ON 姓名 TAG index_name ”建立索引后,下列叙述错误的是 ( ) 。
A.
此命令建立的索引是当前有效索引
B.
此命令所建立索引将保存在 IDX 文件中
C.
表中记录按索引表达式升序排序
D.
此命令的索引表达式是“姓名”,索引名是“ index_name ”
【单选题】执行命令:INDEX on姓名TAG index_name,建立索引后,下列叙述错误的是()
A.
此命令建立的索引是当前有效索引
B.
此命令所建立的索引将保存在.idx文件中
C.
表中记录按索引表达式升序排序
D.
此命令的索引表达式是:姓名
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