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You need to maintain a record of all transactions on some tables for at least three years. Automatic undo management is enabled for the database.What must you do accomplish this task?()A. Enable supplemental logging for the database.B. Specify undo retent

题目
You need to maintain a record of all transactions on some tables for at least three years. Automatic undo management is enabled for the database.What must you do accomplish this task?()

A. Enable supplemental logging for the database.

B. Specify undo retention guarantee for the database

C. Create Flashback Data Archive in the tablespace where the tables are stored.

D. Create Flashback Data Archive and enable Flashback Data Archive for specific tables

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1.—Must I be in hospital for a week， Doctor? —No， you_________. You can go back home tomorrow.A. mustn’t B. needn’t C. must

2.－－Must we finish our homework now? －－No, you ______. You _______ finish it after school.A.needn't , mayB.mustn't , mayC.can't , canD.needn't , must

3.May I take this book out of the reading room? No,you . You read it in here. ( )A. mightn’tB. won’tC. need’tD. mustn’t

4.Your little girl is becoming very rude. You ________ scold her.A.mayB.canC.ought toD.need

更多“You need to maintain a record of all transactions on some tables for at least three years. Automatic undo management is enabled for the database.What must you do accomplish this task?() ”相关问题

  • 第1题：

    9． _______you _______ stay at home today?

    A． Do ; have to

    B． Must; have to

    C． Have; to

    D． Do ; must


    正确答案：A
    9．A【解析】have to的疑问形式借助动词do来实现， must的疑问形式是将must提到主语之前，另外还需注意have to与must不能重复使用。故答案为A。

  • 第2题：

    A:I haven't eaten all day.

    B: You __ be very hungry.

    A. should

    B. have to

    C. must


    参考答案：C

  • 第3题：

    —_______ I return the book to the library this week?— No, you _______.You can keep it until the end of this month.

    A.Must; needn’t

    B.Can; can’t

    C.May; mustn’t

    D.Can; mustn’t


    答案：A

  • 第4题：

    you， do， eraser， how， spell【连词成句）

    ________________________？


    正确答案：
    54. How do you spell eraser 

  • 第5题：

    A: I haven't sat down all day.

    B: You _____be very tired.

    A. could

    B. have to

    C. must


    参考答案：A

  • 第6题：

    3．—__________ 1 go out for a while?

    —No，you __________ You must finish your homework first．

    A． Must，needn't

    B． Can，may

    C． May，mustn't

    D． May，must


    正确答案：C

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