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【单选题】
请问以下程序的执行结果是( ) #include "iostream.h" #include "stdio.h" void main( ){ int w=4,x=3,y=2,z=1; cout<<(wA.
1
B.
2
C.
3
D.
4
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举一反三
【单选题】Do you shareChris Singer’s almost religious ________ for Bob Dylan?
A.
reverence
B.
reverent
C.
kindness
D.
act
【简答题】写出下列随机试验的样本空间: (1)抛三枚硬币; (2)抛三颗骰子; (3)连续抛一枚硬币,直至出现正面为止; (4)口袋中有黑、白、红球各一个,从中任取两个球,先从中取出一个,放回后再取出一个; (5)口袋中有黑、白、红球各一个,从中任取两个球,先从中取出一个,不放回后再取出一个.
【单选题】Bob Dylan is known for everything below EXCEPT ______.
A.
his particular voice
B.
the quality of his song-writing
C.
the quantity of his record sales
D.
his importance in rock music
【单选题】Bob Dylan is ______.
A.
a rock singer
B.
an English singer
C.
a blues singer
D.
a country singer
【简答题】判断下列事件中，哪些事件发生的可能性是相同的，哪些不是． （1）抛一枚均匀的骰子，出现1点或5点朝上的机会． （2）从装有5个红球，3个白球的袋中任取一球，取到红球或白球的可能性． （3）从一副扑克牌中任取一张，取到小王或黑桃5的可能性． （4）掷两枚骰子，出现的点数和是“2”和“5”的可能性．
【简答题】阅读理解。 Dolan began swimming at the age of 5,because his elder sister Kathleen was a swimmer.' Whatever she did, I wanted to beat her,' he says. While he says he was a' pool rat' as a child, he didn't a...
【多选题】Which of the following statements are not true about Bob Dylan?
A.
Bob Dylan won the Nobel Prize in Literature in 2017.
B.
Bob Dylan has created new poetic expressions within the great American song tradition.
C.
Bob Dylan told stories by combining words and thoughts and images.
D.
Bob Dylan's songs are rooted in the rich tradition of American Rock n' Roll music.
【单选题】1口袋里有红、白、黑球各若干个,从中随机地摸出一个,是红球; 2在标准大气压下,水在90度沸腾; 3射击运动员射击一次,命中10环; 4同时掷两颗骰子,出现的点数之和不超过12 上述事件中,随机事件是
A.
①④
B.
②③
C.
①③
D.
②④
【多选题】Select the two correctstatements from the list below that describe DES and 3DES： （）
A.
3DES is muchmore secure than DES.
B.
Both DES and 3DES are stream ciphers.
C.
DES uses bitkeys， although the effective key lengthis only 56bits.
D.
The decryption operation for both DES and 3DES is the same as the encryption operation.
E.
DES can only be used for encryption， whereas 3DES can also be used for authentication.
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