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【单选题】
本福德定律 Benford's law，通常是指？A.
说明一堆从实际生活得出的数据中，以0为首位数字的数的出现概率约为总数的三成。
B.
越大的数，以它为首几位的数出现的概率就越大。
C.
可用于检查各种数据是否有造假。
D.
数据需要经过人为修饰
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【单选题】All flights because of the snowstorm ,many passengers could do nothing but wait.
A.
had been cancelled
B.
were cancelled
C.
have been cancelled
D.
having been cancelled
【简答题】FIRST there were the overhead televisions showing films. Then seatback entertainment screens were introduced. More recently, many airlines have introduced in-flight entertainment services that can be ...
【单选题】All flights ___ because of the snowstorm, many passengers could do nothing but take the train. A. were canceled B. having been canceled C. had been canceled D. have been canceled
A.
选择1
B.
选择2
C.
选择3
D.
选择4
【简答题】IP地址分为几类?其中常用的三类IP地址的第一个字节的数分别是多少?
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