1.Filltheblankswiththewordsorexpressionsgivenbellow.Changetheformwherenecessary.
costconfirmcalloffgetovertakeoverpay
neitherprivilegeaccountforresultin
1.Oursloganisthat“quantityshouldneverbeincreasedatthe_____ofthequality.”
2.Thenewsoftheaircrashisnotyet_____bythegovernment.
3.WhenMr.Greenretired,hisson_____thebusiness.
4.Ihavetwofriendsbut_____ofthemlikestogofishingwithme.
5.Hisunhappychildhood_____hisbadtemper.
6.Theboy’slaziness_____hisfailureintheexams.
7.Onlyguestsofthehotelenjoythe_____ofusingtheprivatebeach.
8.Tom_____morethantwentypoundsforthedictionary.
9.Thegovernorhadto_____allhisappointmentsforthedayandrushtothetrainaccident.
10.Ittookmealongtimeto______thedisappointmentoflosingthematch.
2.PutthefollowingsentencesintoEnglish.
1.每个人都是自己命运的主人.
2.以牙还牙.
3．事实胜于雄辩.
4．失败是成功之母.
5．欲速则不达.
6．笑到最后的人才是笑的最好的.
7．千里之行始于足下.
8．有其父必其子.
9.爱屋及乌.
10.人多好办事.
《概率与统计》作业
1．设随机变量X与Y相互独立,且X,Y的分布律分别为
X01Y12
PP
试求：（1）二维随机变量（X,Y）的分布律；（2）随机变量Z=XY的分布律.
2．设P（A）=0.4,P（B）=0.5,且P（）=0.3,求P（AB）.
3．设随机变量X的概率密度为
试求：（1）常数c；（2）E（X）,D（X）；（3）P{|X-E（X）|
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