A.0
B.1
C.3
D.语句有错
[单选题]执行下列命令:X=200Y=100?IIF(X>Y,X-Y,X+Y)则结果为______。A.100B.300C.200D.400
[单选题]设inta,x=2;执行语句a=x>0?3*x:x=10;后,变量x的值是()。A . 1B . 2C . 6D . 10
[单选题]与“y=(x>0?1:x0)y=1; else if(x0)y=1; else if(xO)y=1; else if(x=-0)y=0; else y=-l;D.y=0; if(x>=0) if(x>=0)y=1; else y=-l;
[单选题]与y=(x>0? 1:x0)y=1 else if(x<0)y=£1; else y=O;B.i与y=(x>0? 1:x<0? -1:0);的功能相同的if语句是A.if(x>0)y=1 else if(x<0)y=-1; else y=O;B.if(x) if(x>0)y=1; else if(x<0)y=-1;C.y=-1; if(x) if(x>0)y=1; else if(x==0)y=0; else y=-1;D.y=0; if(x>=0) if(x>0)y=1; else y=-1
[单选题]设(x-y)(x+2+y)-15=0,则x+y的值是()。A.-5或3B.-3或5C.3D.5
[单选题]已知:X=-99,则函数IIF(x>0,1,iif(x=0,0,-1)))的返回结果是()。A . 0B . 1C . -1D . -99
[单选题]已知:X=0,则函数IIF(x>0,1,iif(x=0,0,-1)))的返回结果是()。A . 0B . 1C . -1D . 100
[单选题]阅读下述程序段:y=-1;if(x!=0)if(x>0)y=1;elsey=0;该程序段所描述的数学关系是( )。A.B.C.D.
[单选题]下面的程序片段y=-1;if(x!=0)if(x>0)y=1;else y=0;所表示的数学函数关系是_______。A.B.C.D.
[问答题]设相互独立的随机变量X,y分别服从参数λ1=2和λ2=3的指数分布,则当x>0,y>0时,(X,Y)的概率密度f(x,y)=().