You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user-managed consistent backups are performed every Sunday night. On Thursday morning， you find that an important ta

题目

You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user-managed consistent backups are performed every Sunday night. On Thursday morning， you find that an important table has been dropped and purged. With reference to this scenario， up to what point in time can the data be recovered？（）

  • A、 until Thursday morning
  • B、 until that point in time when the database is opened
  • C、 until that point in time when the recovery is performed
  • D、 until last Sunday’s backup
  • E、 until that point in time when the table is dropped and purged
  • F、 until Wednesday evening
相似考题

1.Yet unfortunately, ____you want to forbid it, the more they want to have a look at it.A、ifB、the moreC、oneD、only when

2.“__________ you know what you have to offer and what you want, you can start finding an employer to match.“A. Only whenB. OnceC. Even ifD. Much as

3.Not only you but also Tom ( )such a mistake.A、have madeB、has madeC、were madeD、is made

4."__________ you know what you have to offer and what you want, you can start finding an employer to match."A. Much asB.OnceC. Only whenD. Even if

更多“You have only ”相关问题

  • 第1题：

    that was a great dinner____. Thanks. But it really took only an hour.

    A)I have never had it before

    B)I enjoyed it very much

    C)you must have spent all day cooking

    D)who cooked it?


    参考答案：C

  • 第2题：

    Not only you but also I mistaken.()

    A. am

    B. had

    C. were

    D. have


    参考答案：A

  • 第3题：

    Which one of these statements about connecting to the Internet is true?(68).

    A．The Internet can only be used to link computers with same operating system

    B．The Internet can be used to connect computers with different ISP

    C．You must have a telephone line to connect to the Internet

    D．You must have a modem to connect to the Internet


    正确答案：B
    解析：译文：下列关于连接到Internet的说法中，哪一个是正确的?B选项的译文是：Internet能够连接使用不同ISP(Internet服务提供商)的计算机，因此B是正确的。

  • 第4题：

    Alice: Stella, this is my boyfriend Rock.

    Stella: ______

    A、You may only have one.

    B、Yours is lovely, too.

    C、Oh,really? Nice to meet you.

    D、Very well, thank you.


    参考答案：C

  • 第5题：

    How（）you say that you really understand the whole story if you have covered only part of the article?

    Acan  

    Bmust 

    Cneed  

    Dmay


    A
    略

  • 第6题：

    In which two cases would you use an outer join? （）

    • A、The tables being joined have NOT NULL columns.
    • B、The tables being joined have only matched data.
    • C、The columns being joined have NULL values.
    • D、The tables being joined have only unmatched data.
    • E、The tables being joined have both matched and unmatched data.
    • F、Only when the tables have a primary key-foreign key relationship.

    正确答案:C,E

  • 第7题：

    You are working on a database that must be functioning 24 hours a day， 7 days a week. The databaseis configured in ARCHIVELOG mode.  Which two options do you have for performing user-managed backups（）

    • A、You can perform consistent backups only.
    • B、You can perform a complete database backup without shutting down the database instance.
    • C、You can back up data files only when all data files have the same SCN recorded in the control file.
    • D、You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.

    正确答案:B,D

  • 第8题：

    单选题
    How（）you say that you really understand the whole story if you have covered only part of the article?
    A

    can  

    B

    must 

    C

    need  

    D

    may


    正确答案： C
    解析： 暂无解析

  • 第9题：

    多选题
    You have been asked to develop an application that uses only connection-oriented protocols. Which two protocols can you use?（）
    A

    PPP

    B

    UDP

    C

    TCP

    D

    ICMP


    正确答案： A,C
    解析： 暂无解析

  • 第10题：

    单选题
    Only when you have accumulated enough credits will you be _____ to apply for the degree.
    A

    elementary

    B

    ethnic

    C

    eligible

    D

    elegant


    正确答案： D
    解析：
    句意：只有你积累了足够的学分时才有资格申请学位。elementary基本的，基础的。ethnic种族的。eligible有资格的。elegant优雅的。

  • 第11题：

    多选题
    Half of your network uses RIPv2 and the other half runs OSPF. The networks do not communicate with each other. Which two of these factors describe the impact of activating EIGRP over each separate part？（）
    A

    EIGRP will not be accepted when configured on the actual RIPv2 routers.

    B

    OSPF will no longer be used in the routing table， because you only have EIGRP internal routes running.

    C

    OSPF will no longer be used in the routing table， because you only have EIGRP external routes running.

    D

    RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP external routes running.

    E

    RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP internal routes running.

    F

    OSPF database will have RIPv2 routes.


    正确答案： D,E
    解析： 暂无解析

  • 第12题：

    单选题
    Only when you have a good knowledge of grammar______write correctly.
    A

    you will

    B

    you can

    C

    can you

    D

    can't you


    正确答案： C
    解析：

  • 第13题：

    You have only 1000 words in which to ______ his speech.

    A：amount to

    B：sum up

    C：lead to

    D：take up


    正确答案：B 

  • 第14题：

    Student: How long can I have these books?

    Librarian: This one is on the three-hour-loan; you may have it for only three hours ______.

    A: The others are due in 30 days, on February 3.

    B: You may have it longer if you like.

    C: Drop the books into the RETURN boxes by the library entrance.

    D: The fine for overdue books is 5 dollars an hour.


    参考答案：A

  • 第15题：

    If only you ()him what I said Everything would have been fine.

    A、didn t told

    B、hadn t told

    C、would not tell

    D、would have not told


    参考答案：B

  • 第16题：

    If you（）stop smoking, you can only expect to have a bad cough.

    Awon’t

    Bwouldn’t

    Cdon’t

    Dcan’t


    A
    略

  • 第17题：

    A computer can only do（）you have instructed it to do.

    Ahow

    Bafter

    Cwhat

    Dwhen


    C
    略

  • 第18题：

    In which scenario will you perform a cancel-based recovery？（）

    • A、 when a tablespace is dropped and you have only RMAN-based backup of the database
    • B、 when a table is dropped and stored in the Recycle Bin
    • C、 when you are required to recover an existing table to its previous state
    • D、 when a tablespace is dropped and you have only a user-managed full backup of the database

    正确答案:D

  • 第19题：

    单选题
    In which scenario will you perform a cancel-based recovery？（）
    A

     when a tablespace is dropped and you have only RMAN-based backup of the database

    B

     when a table is dropped and stored in the Recycle Bin

    C

     when you are required to recover an existing table to its previous state

    D

     when a tablespace is dropped and you have only a user-managed full backup of the database


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    If you（）stop smoking, you can only expect to have a bad cough.
    A

    won’t

    B

    wouldn’t

    C

    don’t

    D

    can’t


    正确答案： B
    解析： 暂无解析

  • 第21题：

    问答题
    Practice 5　 Listen to the following passage. Write in English a short summary of around 150-200 words of what you have heard. You will hear the passage only once and then you will have 25 minutes to finish your summary. This part of the test carries 20 points. You may need to scribble a few notes to write your summary. _____________________________________________________________________________________________________________________________________________________________________________________________

    正确答案： 【文章梗概】
    本文的主题是测谎仪。文章认为目前测谎仪已有渗透到日常生活中的趋势,但目前仍没有研究表明测谎仪真的有效。几个世纪以来世界各国人们都在孜孜不倦地寻求通过物理手段检测谎言的仪器。随着科技的发展,声音分析器开始流行,这种仪器工作原理并不复杂,而且使用简单、携带方便。现在仍有先进产品上市,前景良好。美国政府对测谎仪的使用制定了双重标准,一方面政府加大使用测谎仪的力度,一方面命令法庭禁用经测谎仪得到的结果。
    【参考答案】
    综述内容应包括5个主要点信息和9个次要点信息中的5个。下划线部分为主要点, 斜体部分为次要点。
    Lie detectors, those controversial assessors of truth, are making their way into everyday life. Insurance companies use them to help catch people filing fraudulent claims. Suspicious spouses use hand-hand versions to judge whether their significant others are cheating. Interrogators for the U.S. government use them to double-check analyses of who might be terrorists.
    Polygraphs, which have been used for decades, have been joined by new systems that purportedly analyze a person's voice, blush, pupil size and even brain waves for signs of deception. The devices range from costly experimental devices that use strings of electrodes or thermal imaging to $19.95 palm-sized versions.
    No studies haVe ever proven that lie detectors work. Many show that they assess truth as accurately as a coin flip; in other words, not at all. Still, some people have come to depend on them. The recent proliferation of lie detectors has reignited a decades-old debate over the ethics and politics of when and how they should be used and whether such important questions as guilt or innocence should be left to machines.
    Mankind has looked for centuries for a physical indicator that would expose a liar. The Romans studies the entrails of suspected liars. In China, rice was shoved into the mouths of interviewees to measure how dry they were—the drier the mouth, the more likely the person was lying, it was thought. Other cultures tried various chemical concoctions, but they worked no better than chance.
    Especially since September 11, law enforcement agencies consider lie detection systems critical to their investigations. The CIA, FBI and Defense Department have spent millions of dollars on them. In an unusual plea made soon after the terrorist auacks, the government asked for the public’s help in building counterterrorism technologies, among them a portable polygraph.
    In the United States, there is a double standafd when it comes to the use of polygraphs. Although the so-called lie detector is considered an important law enforcement tool, polygraph data are inadmissible as evidence in a court of law. The U.S. Supreme Court forbade private companies from using them to screen job applicants, but allowed the government to use them for the same purpose.
    As debate about polygraphs rages, the devices are being phased out in favor of voice analyzers, which are more portable and easier to use. A voice analyzer device typically consists of a telephone and microphone attached to a computer that packs neatly in a briefcase, or attached to any PC with the proper software installed. Most of the analyzers can be used in person or over the phone. Conversations can be tested in real time or recorded for later analysis.
    First, the questioner asks an interviewee about something he or she would have no reason to lie about, such as “When’s your birthday?” Then he asks what he really wants to ask. The device makes an assessment about whether the subjects is telling the truth based on the differences between the inaudible microtremors in the voice during the first round of questioning and those in the second.
    The federal government officially says it does not use these voice lie detectors. Still, the voice technology has its true believers, among them more than 1.200 police departments nationwide and tens of thousands of consumers.
    The slightly more sophisticated Truster software program that runs on a desktop computer gives text rating of truthfulness. The companies that market these technologies say they are more than 80 percent accurate.
    Though skeptical, Rick Garloff, a 35-year-old American, still said even if the systems are not great lie detectors, they are wonderful lie deterrents. He once used the Truster on his 9-year-old son, to see if he had forgotten to close a door, accidentally letting the dog in. His son claimed no. But the lie detection system said yes. When confronted, his son confessed.
    【解 析】
    一、主干内容表达部分:
    这部分内容为文章的主干内容,是综述的主要点信息。
    1. Lie detectors, those controversial assessors of truth, are making their way into everyday life.
    [分析]本句开宗明义,点明文章的主题,是全文的框架性内容。
    2. No studies have ever proven that lie detectors work.
    [分析]本句位于段落首,是全段中心句,而且本段所讨论的内容也是全文主要论点之一,因此该句是全文的框架性内容。
    3. Mankind has looked for centuries for a physical indicator that would expose a liar.
    [分析]本句位于段落首,是全段中心句,而且本段所讨论的内容即测谎仪的历史追溯也是全文主要内容,为文章论点的提出奠定基础,因此该句是全文的框架性内容。
    4. In the United States, there is a double standard when it comes to the use of polygraphs.
    [分析]本句位于段落首,是全段中心句。人类对测谎仪的使用态度是全文讨论的重点内容,因此该句为全文的框架性内容。
    5. As debate about polygraphs rages, the devices ale being phased out in favor of voice analyzers, which are more portable and easier to use.
    [分析]本句位于段落首,是全段中心句。测谎仪发展的主流和趋势是全文讨论的重点内容,因此该句为全文的框架性内容。
    二、支持性细节表达部分
    这部分内容为主要点的重要支持性细节,是综述的次要点信息。
    1. Polygraphs, which have been used for decades, have been joined by new systems that purportedly analyze a person’s voice, blush, pupil size and even brain waves for signs of deception.
    [分析]本句简单介绍普遍认为的测谎仪工作原理,丰满了全文框架性内容,是重要的支持性细节。
    2. The recent proliferation of lie detectors has reignited a decades-old debate over the ethics and politics of when and how they should be used and whether such important questions as guilt or innocent should be left to machines.
    [分析]本句是对全文主要观点的进一步阐释,引发全文讨论的重点,是重要的支持性细节。
    3. Especially since September 11, law enforcement agencies consider lie detection systems critical to their investigations.
    [分析]本句位于段首,是全段中心句,以典型人物的具体事例强调了文章主要观点,有力地支持了文章的扩展,是重要的支持性细节。
    4. The government asked for the public’s help in building counterterrorism technologies,among them a portable polygraph.
    [分析]本句位于段尾,是全段总结句,进一步证明了该段中心句内容,为全文主要观点提供了有力的证据,是重要的支持性细节。
    5. Although the so-called lie detector is considered an important law enforcement tool, polygraph data ale inadmissible as evidence in a court of law.
    [分析]本句是对全文主要观点的进一步解释和说明,是主要观点的具体化,因此是重要的支持性细节。
    6. Most of the analyzers can be used in person or over the phone. Conversations can be tested in real time or recorded for later analysis.
    [分析]本句是对全文主要内容,即测谎仪发展的主流和趋势的进一步解释和说明,因此是重要的支持性细节。
    7. The device makes an assessment about whether the subjects is telling the truth based on the differences between the inaudible microtremors in the voice during the first round of questioning and those in the second.
    [分析]本句是对主流测谎产品工作原理的介绍,丰满了全文主要内容,因此是重要的支持性细节。
    8. The federal government officially says it does not use these voice lie detectors. Still, the voice technology has its true believers.
    [分析]本句是对全文主要内容的扩展和延伸,从市场角度证明了测谎仪的流行,丰富了全文主要内容,因此是重要的支持性细节。
    9. The slightly more sophisticated Truster software program that runs on a desktop computer gives text rating of truthfulness.
    [分析]本句介绍了测谎仪的流行产品及市场情况,暗示了测谎仪的前景。使对主题的讨论充满意义,丰满了全文主要内容,因此是重要的支持性细节。
    【录音原文】
    Lie detectors, those controversial assessors of truth, are making their way into everyday life. Insurance companies use them to help catch people filing fraudulent claims. Suspicious spouses use hand-hand versions to judge whether their significant others are cheating. Interrogators for the US government use them to double check analysis of who might be terrorists.
    Polygraphs, which have been used for decades, have been joined by new systems that purportedly analyze a person’s voice, blush, pupil size and even brain waves for signs of deception. The devices range from costly experimental devices that use strings of electrodes or thermal imaging to $19.95 palm-sized versions.
    No studies have ever proven that lie detectors work. Many show that they assess truth as accurately as a coin flip; in other words, not at all. Still, some people have come to depend on them. The recent proliferation of lie detectors has reignited a decades-old debate over the ethics and politics of when and how they should be used and whether such important questions as guilt or innocence should be left to machines.
    Mankind has looked for centuries for a physical indicator that would expose a liar. The Romans studied the entrails of suspected liars. In China, rice was shoved into the mouths of interviewees to measure how dry they were—the drier the mouth, the more likely the person was lying, it was thought. Other cultures tried various chemical concoctions, but they worked no better than chance.
    Especially since September 11, law enforcement agencies consider lie detection systems critical to their investigations. The CIA, FBI and Defense Department have spent millions of dollars on them. In an unusual plea made soon after the terrorist attacks, the government asked for the public’s help in building counterterrorism technologies, among them a portable polygraph.
    In the United States, there is a double standard when it comes to the use of polygraphs. Although the so-called lie detector is considered an important law enforcement tool, polygraph data are inadmissible as evidence in a court of law. The US Supreme Court forbade private companies from using them to screen job applicants, but allowed the government to use them for the same purpose.
    As debate about polygraphs rages, the devices are being phased out in favor of voice analyzers, which are more portable and easier to use. A voice analyzer device typically consists of a telephone and microphone attached to a computer that packs neatly in a briefcase, or attached to any PC with the proper software installed. Most of the analyzers can be used in person or over the phone. Conversations can be tested in real time or recorded for later analysis.
    First, the questioner asks an interviewee about something he or she would have no reason to lie about, such as “When’s your birthday?” Then he asks what he really wants to ask. The device makes an assessment about whether the subject is telling the truth based on the differences between the inaudible microtremors in the voice during the first round of questioning and those in the second.
    The federal government officially says it does not use these voice lie detectors. Still, the voice technology has its true believers, among them more than 1,200 police departments nationwide and tens of thousands of consumers.
    The slightly more sophisticated Truster software program that runs on a desktop computer gives text rating of truthfulness. The companies that market these technologies say they are more than 80 percent accurate.
    Though skeptical, Rick Garloff, a 35-year-old American, still said even if the systems are not great lie detectors, they are wonderful lie deterrents. He once used the Truster on his 9-year-old son, to see if he had forgotten to close a door, accidentally letting the dog in. His son claimed no. But the lie detection system said yes. When confronted, his son confessed.
    解析： 暂无解析

  • 第22题：

    单选题
    There is only one boat ______ for hire. I'm afraid you have to wait for the next one.
    A

    superior

    B

    capable

    C

    complicated

    D

    available


    正确答案： D
    解析：

  • 第23题：

    单选题
    It can be inferred from this passage that ______.
    A

    airlines used to offer additional benefits to passengers who volunteered to be bumped

    B

    volunteering to be bumped is always a lucrative deal

    C

    when you are bumped to a different flight you usually have to wait only a few minutes

    D

    overbooking flights is a growing practice in the airline industry

    E

    free－flight vouchers have fewer limitations than do vouchers for only a specified dollar amount


    正确答案： C
    解析：
    文中提到志愿乘坐晚一点的航班得到的报酬没有原来丰厚了，故选A项。

  • 第24题：

    单选题
    I have only two tickets for TF Boys’ concert. ______ you ______ he can go on with me.
    A

    Either; or

    B

    Neither; nor

    C

    Both; and

    D

    Not only; also


    正确答案： C
    解析：
    我只有两张演唱会门票，所以你和他只有一个人可以跟我一起去。euther…or…表示两者择一，不是…就是…

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