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You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema.You execute the following statement:FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2;What will be the resul

题目

You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema.You execute the following statement:FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2;What will be the result of executing this statement?（）

A. One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.

B.One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.

C. Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.

D. None of the tables are recovered from the Recycle Bin, and the statement returns an error.

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    Merry Christmas, George! Here is a card for ________, with ________ best withes.

    A.you…your

    B.you…our

    C.us…our

    D.us…your


    参考答案：B

  • 第2题：

    You've misspelled this word again.You'd better look it up ()

    此题为判断题(对，错)。


    参考答案：对

  • 第3题：

    Me,you是两个初始集合，则下列关于派生集合定义方式正确的是

    A．link/me,you/:a;

    B．link(me,you):a;

    C．link/me you/a;

    D．link(me,you)/a;


    link(me,you):a;

  • 第4题：

    – David, you've been losing your temper over nothing lately.– ( ).

    A. I haven’t been getting much sleep either

    B. You’d better not push yourself too hard, or you’ll get sick

    C. I’m sorry. I shouldn’t have blown up like that

    D. You’d better do exercises regularly


    正确答案:C

  • 第5题：

    （ ） – Is Miss White __________ English teacher, Maria?

    – No, she teaches __________ geography.

    A．your；my

    B．you；mine

    C．you；us

    D．your；us


    正确答案：D

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    你最好控制一下上网聊天的时间。（汉译英）

    A．You'd better set a limit for your online chat time.

    B．You'd better set a limit on your online chat time.

    C．You'd better set a limit on your online chatting time.

    D．You'd better set a limit for your online chatting time.


    You'd better set a limit on your online chatting time.

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