Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）A、UniqueB、CheckC、ReferentialD、Informational

题目

Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）

  • A、Unique
  • B、Check
  • C、Referential
  • D、Informational
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参考答案和解析
正确答案:B
更多“Which of the following constrain”相关问题

  • 第1题：

    Which of the following is a performance optimization technology?（）

    • A、QoS
    • B、Trunking
    • C、Spanning
    • D、VoIP

    正确答案:A

  • 第2题：

    Which of the following commands will be run at a command prompt to determine which WindowsOS is running on the computer?（）

    • A、VER
    • B、Device Manager
    • C、VERIFY
    • D、SET

    正确答案:A

  • 第3题：

    单选题
    Which of the following main messages was conveyed in this passage?
    A

    An inspiring idea to liberalize transpacific trade hinges on the courage of America and, especially, Japan.

    B

    TPP is meant to engage and incorporate China, rather than constrain it.

    C

    The farming and health care industries in Japan would be severely affected by the TPP.

    D

    TPP as a Washington-led sideswipe at China will win support in Japan and add to a more liberalized Asia-Pacific region.


    正确答案： B
    解析：
    主旨题，从全文来看，本文旨在说明要建立TPP，美国和日本需要作出不懈努力，特别是日本。文章在简单介绍了在火奴鲁鲁召开的“a summit of Asia-Pacific leaders”和“TPP”的优势之后，在第三段提到要创建“a wider TPP”还需要很长的路要走，作为创建者，Mr. Obama和Yoshihiko Noda需要表现出更强的领导力。之后文章分别阐述了日本和美国需要作出的努力。例如Mr. Noda需要协调党派之间和党内反对派，以及民众的呼声；还需要争取时间以便使日本神圣的“farming and health care industry”做调整。美国也需要作出相应改变，比如从文章倒数第二段可以看出，奥巴马必须忍受国内汽车工业联合会对于和日本贸易不公的抱怨，同时也要强调TPP意图“engage and incorporate”中国而非“constrain it”。但是相对于日本，“costing America little”。由此可知，A选项说放宽泛太平洋地区贸易的想法，源自于美国、尤其是日本的勇气是正确的。

  • 第4题：

    单选题
    Which of the following is not a wind（）.
    A

    Growler

    B

    Norther

    C

    Levanter

    D

    Mistral


    正确答案： C
    解析： 暂无解析

  • 第5题：

    Which of the following utilities are used to choose which programs run at startup？ （）

    • A、SFC
    • B、SETDEBUG
    • C、MSCONFIG
    • D、REGEDIT

    正确答案:C

  • 第6题：

    单选题
    Which of the following technologies can improve convergence time following a link failure in a serviceprovider network？（）
    A

    MPLS TE FR

    B

    MPLS VPN

    C

    BFD

    D

    RSVP

    E

    VPLS

    F

    SNMP


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Failure to control the growth of international debt will also constrain living standards.
    A

    enhance

    B

    reinforce

    C

    restrain

    D

    stabilize


    正确答案： D
    解析：
    句意：不能控制国外债务的增加也将影响生活水平的提高。constrain的意思是“限制”。enhance提高；加强。reinforce增强，加固；stabilize稳定。

  • 第8题：

    单选题
    Which of the following is a hybrid network topology used for fault tolerance, in which all computersMUST connect to each other?（）
    A

    Star

    B

    Ring

    C

    Bus

    D

    Mesh


    正确答案： D
    解析： 暂无解析

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