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【判断题】
Hash是把任意长度的输入通过散列算法,变换成固定长度的输出。()
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】The reason for his absence from school was ____ he fell ill.
A.
because
B.
why
C.
what
D.
that
【单选题】What did the doctor think was the reason for his trouble?
A.
He has been sitting too much.
B.
He has been working too hard in his office.
C.
He has been watching too much of TV.
D.
He has been eating too much.
【单选题】关于主键描述正确的是:
A.
主键只能包含一列
B.
主键可以包含多列
C.
一个学生表里可以用姓名列作为主键
D.
主键可以重复
【单选题】The reason for his success is ______ he worked very hard.
A.
why
B.
that
C.
whether
D.
how
【单选题】Being late was the reason for his layoff.
A.
denied in
B.
admitted to
C.
erected in
D.
assigned as
【单选题】关于主键描述正确的是
A.
包含一列
B.
包含两列
C.
包含一列或者多列
D.
以上都不正确
【简答题】马克思主义哲学的理论渊源是德国古典哲学,能否把马克思主义哲学看成是费尔巴哈 和黑格尔哲学体系的相加?
【单选题】Which of the following was not the reason for his running away from home?
A.
The money his father gave him was meager.
B.
He did not reach a consesus with his parents on whether to go to college or not
C.
He  thought the work on the farm was meaningless and boring.
D.
He was very angry because his father gave him a good beating.
【单选题】关于主键描述正确的是:
A.
一张表中只能有一个主关键字
B.
一张表中可以有多个主关键字
C.
主关键字的列值可以重复
D.
以上都不正确
【单选题】关于主键描述正确的是:
A.
包含一列
B.
包含两列
C.
包含一列或者多列
D.
以上都不正确
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