对基于检查点的恢复技术,下列说法中错误的是______。A)无论事务在检查点之前还是

题型:单项选择题

问题:

对基于检查点的恢复技术,下列说法中错误的是______。

A)无论事务在检查点之前还是之后提交,都需执行REDO操作
B)可以提高恢复效率
C)可以定期建立,也可以按照某种规则建立检查点
D)能最大限度地减少恢复数据库时根据日志记录所需执行的恢复操作

考点:计算机等级考试数据库工程师计算机数据库工程师
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未漂白与聚酯短纤混纺其他棉缎布

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A few months ago, I was picking up the children at school. Emily, another mother that I knew well, rushed up to me. She was full of __41__.
“Do you know __42__ you and I are?” she asked. __43__ I could answer, she gave out the reason for her question. She had just returned from renewing her driver’s license at a government office. The woman __44__ desk asked her what her “occupation” was. Emily hesitated, __45__ how to answer it. “What I mean is,” explained the woman, “do you have a job, or are you just a ...?”“Of course I have a job,” answered Emily. “I’m a (an) __46__.”“We don’t __47__ ‘mother’ as an occupation ... ‘housewife’ covers it,” she said.
I forgot all about her story __48__ one day I found myself in the same situation. This time it was at our own Town Hall. The clerk was a woman.
“And what is your occupation?” she asked. What __49__ me say it, I do not know. The words simply jumped out. “I’m ... a (an) ___50___ in the field of Child Development and Human Relations.”
The clerk stopped, her ball-point pen ___51__ in mid-air. She looked up __52__ she had not heard right. I repeated the title slowly.
“Might I ask,” said the clerk with new interest, “just what you do in your ___53__?” Coolly, I heard myself ___54__, “I have a continuing program of research in the
laboratory and in the field. I’m working for my masters (the whole family) and already have __55__ credits (令人增光的人或事物) (all daughters). I often work 14 hours a day (24 is more like it). The job is more challenging than most jobs and the __56__ are in satisfaction rather than just money.”
There was an increasing note of __57__ in the clerk’s voice as she __58__ in the form. As I drove into our driveway(私家车道), I was __59__ by my lab assistants — ages 13, 7, and 3. Inside the house I could hear our new experimental model (six months) in the child-development program.
I felt successful. Motherhood...what a great __60__.
小题1:
A.surpriseB.anxietyC.angerD.excitement
小题2:
A.whoB.whatC.howD.why
小题3:
A.WhenB.AsC.BeforeD.Since
小题4:
A.atB.afterC.byD.around
小题5:
A.nervousB.sureC.anxiousD.uncertain
小题6:
A.motherB.workerC.teacherD.doctor
小题7:
A.thinkB.listC.expectD.give
小题8:
A.sinceB.unlessC.until D.when
小题9: 
A.gotB.causedC.permitD.made
小题10:
A.researcherB.managerC.expertD.scholar
小题11:
A.droppedB.floatedC.frozenD.broke
小题12:
A.so thatB.even thoughC.as thoughD.because of
小题13:
A.familyB.subjectC.studyD.field
小题14:
A.wordsB.replyC.shoutD.whisper
小题15:
A.twoB.threeC.fourD.five
小题16:
A.rewardsB.awardsC.profitsD.benefits
小题17: A. interest           B. respect              C. doubt            D fear
小题18:
A.explainedB.passedC.completedD.filled
小题19:
A.acceptedB.greetedC.recognizedD.refused
小题20:
A.personB.awardC.careerD.business
题型:单项选择题

社会主义先进文化的功能表现在( )。

A.促进全民族的思想道德素质和科学文化素质不断提高

B.为我国经济发展和社会进步提供精神动力和智力支持

C.引导我国社会主义物质文明和精神文明,经济、政治和文化协调发展

D.创造先进的生产力

题型:单项选择题

离心式压缩机干气密封系统对气体介质存在污染。

题型:单项选择题

改善深部回采巷道维护状况,减少维修次数的综合措施有()。

A.加快工作面推进速度

B.缩短回采巷道服务时间

C.改善和加强超前支护

D.加大回采巷道超前支护距离

E.适当加大巷道断面

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