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【单选题】
以下不属于系统安全运行范畴的行为是( )A.
通过授权控制使用者权限
B.
对系统数据进行加密
C.
制定严格的操作人员工作守则
D.
利用多次重复存储数据保证数据的完整性
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【单选题】The only thing ______ really matters to the children is how soon they can return to their uncle's farm.
A.
what
B.
which
C.
was
D.
that
【单选题】The only thing (what) really matters (to) the children (is) (how soon) they can return to their uncle's farm.
A.
what
B.
to
C.
is
D.
how soon
【简答题】How much risk you are willing to accept for a given potential return is a ______(determine) you will have to make for yourself.
【单选题】－Julia, _________will your son return? －In a week.
A.
how often
B.
how far
C.
how soon
D.
how long
【单选题】How would the return of a Labor government affect the political calculations in Northern Ireland is difficult to foresee.
A.
How the return of a Labor government has affected
B.
How will affect the return of a Labor government
C.
How the return of a Labor government will affect
D.
How would affect the return of a Labor government
【单选题】关于 函数凹凸性和拐点,以下叙述错误的是()。
A.
在 处有拐点,则一定有 或 不存在
B.
若区间I上 ,则函数在该区间是凸的
C.
若 是函数拐点,则该点是函数凹凸性发生改变的点
D.
若 是函数拐点,则 两侧函数 符号不同
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