2015经济类联考数学冲刺模拟十二
1、如图6-18所示，正方形http://file.koolearn.com/2014/0219/20140219030342522.gif
内放入4个等圆，
那么阴影部分面积与正方形面积之比为( )
(A)
http://file.koolearn.com/2014/0219/20140219030353544.gif
(B)
http://file.koolearn.com/2014/0219/20140219030353284.gif
(C)
http://file.koolearn.com/2014/0219/20140219030353756.gif
(D)
http://file.koolearn.com/2014/0219/20140219030354768.gif
(E)
http://file.koolearn.com/2014/0219/20140219030354823.gif
2.(980101) 一种货币贬值15%,一年后又增值百分之几才能保持原币值( )
A. 15% B. 15.25% C. 16.78% D. 17.17% E. 17.65%
18、在某一时期内，一条河流某处的年最高水位在各个范围内的概率如下：
年最高水位(
http://file.koolearn.com/2014/0219/20140219030401408.gif
，米)
http://file.koolearn.com/2014/0219/20140219030408125.gif
http://file.koolearn.com/2014/0219/20140219030413203.gif
http://file.koolearn.com/2014/0219/20140219030414831.gif
http://file.koolearn.com/2014/0219/20140219030418685.gif
http://file.koolearn.com/2014/0219/20140219030421288.gif
概率
http://file.koolearn.com/2014/0219/20140219030422403.gif
http://file.koolearn.com/2014/0219/20140219030425167.gif
http://file.koolearn.com/2014/0219/20140219030425737.gif
http://file.koolearn.com/2014/0219/20140219030426732.gif
http://file.koolearn.com/2014/0219/20140219030426938.gif
则在同一时期内，河流的年最高水位在( )
(A)
http://file.koolearn.com/2014/0219/20140219030427772.gif
的概率为
http://file.koolearn.com/2014/0219/20140219030430582.gif
(B)
http://file.koolearn.com/2014/0219/20140219030431205.gif
的概率为
http://file.koolearn.com/2014/0219/20140219030425737.gif
(C)
http://file.koolearn.com/2014/0219/20140219030431449.gif
的概率为
http://file.koolearn.com/2014/0219/20140219030437483.gif
(D)
http://file.koolearn.com/2014/0219/20140219030445942.gif
的概率为
http://file.koolearn.com/2014/0219/20140219030425167.gif
(E)以上结论均不正确
3、
http://file.koolearn.com/2014/0219/20140219030445533.gif
( )
(A)
http://file.koolearn.com/2014/0219/20140219030446678.gif
(B)
http://file.koolearn.com/2014/0219/20140219030446611.gif
(C)
http://file.koolearn.com/2014/0219/20140219030449177.gif
(D)
http://file.koolearn.com/2014/0219/20140219030455341.gif
(E)以上结论均不正确
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