【单选题】【消耗次数：1】
设<imgwidth="90"height="25"v:shapes="_x0000_i1032"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image016.png">，则<imgwidth="87"height="21"v:shapes="_x0000_i1033"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image018.png">（）
①
<imgwidth="83"height="21"v:shapes="_x0000_i1034"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image020.png">
②
<imgwidth="83"height="21"v:shapes="_x0000_i1035"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image022.png">
③
<imgwidth="136"height="42"v:shapes="_x0000_i1036"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image024.png">
④
<imgwidth="136"height="42"v:shapes="_x0000_i1037"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image026.png">
参考答案：
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相关题目
【单选题】
<imgwidth="183"height="25"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image285.png">，且<imgwidth="21"height="25"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image287.png">与<imgwidth="22"height="25"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image289.png">相互独立，则<imgwidth="68"height="25"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image291.png">（）
①
<imgwidth="84"height="25"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image293.png">
②
<imgwidth="92"height="25"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image295.png">
③
<imgwidth="88"height="41"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image297.png">
④
<imgwidth="96"height="41"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image299.png">
【单选题】
设随机变量<imgwidth="13"height="15"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">和<imgwidth="13"height="17"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">的密度函数分别为<imgwidth="131"height="48"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image332.png"><imgwidth="140"height="50"v:shapes="_x0000_i1219"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image334.png">若<imgwidth="13"height="15"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">相互独立，则<imgwidth="57"height="21"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image336.png">（）
①
1
②
<imgwidth="16"height="41"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image338.png">
③
<imgwidth="15"height="41"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image340.png">
④
<imgwidth="16"height="41"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image342.png">
【单选题】
随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1095"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image127.png">服从正态分布<imgwidth="50"height="21"v:shapes="_x0000_i1096"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image129.png">，则<imgwidth="75"height="21"v:shapes="_x0000_i1097"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image131.png">（）
①
<imgwidth="98"height="49"v:shapes="_x0000_i1098"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image133.png">
②
<imgwidth="64"height="44"v:shapes="_x0000_i1099"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image135.png">
③
<imgwidth="90"height="49"v:shapes="_x0000_i1100"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image137.png">
④
<imgwidth="90"height="49"v:shapes="_x0000_i1101"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image139.png">
【单选题】
随机变量<imgwidth="13"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image036.png">的概率密度<imgwidth="132"height="50"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image038.png">则常数<imgwidth="29"height="19"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image040.png">（）
①
1
②
2
③
<imgwidth="17"height="41"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image042.png">
④
<imgwidth="17"height="41"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image044.png">
【单选题】
设X是一随机变量，<imgwidth="17"height="25"v:shapes="_x0000_i1298"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image471.png">为任意实数，<imgwidth="41"height="21"v:shapes="_x0000_i1299"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image473.png">是<imgwidth="19"height="17"v:shapes="_x0000_i1300"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image316.png">的数学期望，则（）
①
<imgwidth="184"height="26"v:shapes="_x0000_i1301"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image476.png">
②
<imgwidth="183"height="26"v:shapes="_x0000_i1302"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image478.png">
③
<imgwidth="183"height="26"v:shapes="_x0000_i1303"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image480.png">
④
<imgwidth="100"height="26"v:shapes="_x0000_i1304"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image482.png">
【单选题】
二维随机变量<imgwidth="46"height="21"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image159.png">概率密度为<imgwidth="203"height="50"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image161.png">则常数<imgwidth="16"height="19"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image163.png">为（）
①
<imgwidth="37"height="19"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image165.png">
②
<imgwidth="42"height="41"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image167.png">
③
<imgwidth="40"height="19"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image169.png">
④
<imgwidth="39"height="19"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image171.png">
【单选题】
设二维随机变量<imgwidth="187"height="26"v:shapes="_x0000_i1135"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image189.png">，且<imgwidth="19"height="17"v:shapes="_x0000_i1136"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image127.png">与<imgwidth="15"height="17"v:shapes="_x0000_i1137"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image185.png">相互独立，则（）
①
<imgwidth="50"height="25"v:shapes="_x0000_i1138"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image191.png">
②
<imgwidth="115"height="26"v:shapes="_x0000_i1139"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image193.png">
③
<imgwidth="61"height="26"v:shapes="_x0000_i1140"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image195.png">
④
<imgwidth="40"height="21"v:shapes="_x0000_i1141"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image197.png">
【单选题】
<imgwidth="361"height="296"v:shapes="_x0000_i1281"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image439.png">
①
<imgwidth="21"height="41"v:shapes="_x0000_i1282"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image441.png">
②
<imgwidth="21"height="41"v:shapes="_x0000_i1283"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image443.png">
③
<imgwidth="21"height="41"v:shapes="_x0000_i1284"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image445.png">
④
<imgwidth="21"height="41"v:shapes="_x0000_i1285"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image447.png">
【单选题】
有放回地抽取500件产品，<imgwidth="19"height="17"v:shapes="_x0000_i1061"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image002.png">表示抽到次品的件数，则<imgwidth="77"height="21"v:shapes="_x0000_i1062"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image074.png">（）
①
<imgwidth="55"height="48"v:shapes="_x0000_i1063"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image076.png">
②
<imgwidth="54"height="48"v:shapes="_x0000_i1064"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image078.png">
③
<imgwidth="128"height="26"v:shapes="_x0000_i1065"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image080.png">
④
<imgwidth="30"height="41"v:shapes="_x0000_i1066"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image082.png">
【单选题】
设随机变量<imgwidth="90"height="21"v:shapes="_x0000_i1067"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image084.png">，则<imgwidth="77"height="21"v:shapes="_x0000_i1068"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image086.png">（）
①
0.0016
②
0.0272
③
0.4096
④
0.8192
随机题目
【单选题】
下面程序的运行结果是（）。#includestdio.huniondata{inti;charc;doubled;}a[2];voidmain(){printf("%d\n",sizeof(a));}
①
16
②
8
③
4
④
2
【单选题】
若有以下定义：structnode{intdata;structnode*next;}structnodem,n,k,*head,*p;已建立如下图所示的链表：mnk┌──┬──┐┌──┬──┐┌──┬──┐head→│data│next┼→│data│NULL│p→│data│next│└──┴──┘└──┴──┘└──┴──┘指针head指向变量m,m.next指向变量n，p指向变量k，不能把结点k插到m和n之间形成新链表的程序段是（）。
①
p-next=head-m.next=p;
②
(*head).next=p;(*p).next=
③
head-next=p-next=head
④
-m.next=k.next=
【单选题】
若已定义：inta=6;floatb=1.5;要求输出形式为：6*1.50=9.00，应选用的正确输出语句是（）。
①
printf("%d*%f=%f",a,b,a*b);
②
printf("%d*%.2f=%.2f",a,b,a*b);
③
printf("%d*%d=%.2f",a,b,a*b);
④
printf("%.2f*%.2f=%.2f",a,b,a*b);
【单选题】
若有以下定义：structnode{intdata;structnode*next;}structnode*p;已建立如下图所示的链表：┌──┬──┐┌──┬──┐┌──┬──┐p→│data│next┼→│data│next┼→...→│data│NULL│└──┴──┘└──┴──┘└──┴──┘指针p指向第一个结点,能输出链表所有结点的数据成员data的循环语句是（）。
①
while(p!=NULL){printf("%d,",p-p++;}
②
while(p){printf("%d,",p.data);p=p-}
③
for(;p!=NULL;p++)printf("%d,",p
④
-for(;p;p=p-next)printf("%d,",(*p).data);
【单选题】
设有结构体的定义如下：structdata{intn;charc;floatf;};则sizeof(structdata)的值是（ ）
①
1
②
3
③
7
④
11