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【简答题】
说明下列2个图例符号名称、字母及数字含义。<img width="70" height="141" style="width: 86px; height: 168px;" src="data:image/png;base64,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"/>[填空(1)]

【单选题】
有定义语句“int a[][3]={1, 2, 3, 4, 5, 6};”,则a[1][0]____。

4
1
2
5
【单选题】
一个集合A={3,4,5,6,7},集合B={1,3,5,7,9},则A和B交集中具有的元素个数为( )。

7
5
3
10
【单选题】
一个集合A={3,4,5,6,7},集合B={1,3,5,7,9},则A和B并集中具有的元素个数为( )。

7
5
3
10
【单选题】
P={x|(x+1)24},Q={x|x2+16≥5x},则下列选项正确(   )

PQ
PQ
QP
Q=P
【单选题】
X1,X2,...,X8来自正态总体 一个样本,令Y=(X1+X2+X3+X42+(X5+X6+X7+X82,若CY服从χ2分布,则C=( )

1/4
1
1/2
2
【单选题】
一个集合A={3,4,5,6,7},集合B={1,3,5,7,9},则A和B差集A-B中具有的元素个数为(  )。

7
5
3
2
【单选题】
若有以下数组说明inta[12]={1,4,7,10,2,5,8,11,3,6,9,12};则i=10;a[a[i]]元素数值( )。

10
9
6
5
【单选题】
集合A={1,23,……,10},下列定义运算关于集合A不封闭(   )

x*y=max{x,y}
x*y=min{x,y}
x*y=GCD{x,y},即x,y最大公约数
x*y=LCM{x,y},即x,y最小公倍数
【单选题】
A ={1357},B = {5, 7, 9,11},则A∪B()

{13, 5}
{1,357}
{1, 3, 5, 7,9}
{1, 3, 5, 7,9, 11}