2013年成人高考专升本《高等数学二》深度押密试卷(3)
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一、选择题:本大题共10个小题,每小题4分,共40分。在每小题给出的四个选项中,只有一项是符合题目要求的,选出正确选项。
1、
2、
3、
4、
5、
6、两封信随机地投入标号为1,2,3,4的4个邮筒,则1,2号邮筒各有一封信的概率.等于
A.1/16
B.1/12
C.1/8
D.1/4
7、
8、
9、
10、
1、
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2、
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3、
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4、
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5、

6、两封信随机地投入标号为1,2,3,4的4个邮筒,则1,2号邮筒各有一封信的概率.等于
A.1/16
B.1/12
C.1/8
D.1/4
7、

8、
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9、
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10、
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