分析下段代码输出结果是 var t = 10;function test(test){ t = t + test; var t = 3; console.log(t); } test(t); A: 6 B: 3 C: 13
分析下段代码输出结果是 var t = 10;function test(test){ t = t + test; var t = 3; console.log(t); } test(t); A: 6 B: 3 C: 13
设Varξ=Varη=Var(ξ-2η)=1, 则COV(ξ,η)=______
设Varξ=Varη=Var(ξ-2η)=1, 则COV(ξ,η)=______
以下程序的输出结果是: declare var int; case var when 0 then select 'var is 0'; when 1 then select 'var is 1'; else select 'var is not 0 or 1'; end case; A: 不输出任何内容 B: 报错 C: var is 0 D: var is not 0 or 1
以下程序的输出结果是: declare var int; case var when 0 then select 'var is 0'; when 1 then select 'var is 1'; else select 'var is not 0 or 1'; end case; A: 不输出任何内容 B: 报错 C: var is 0 D: var is not 0 or 1
var a ='1' var b = 1 var c =true console.log(a-c-b) 请问输出的结果
var a ='1' var b = 1 var c =true console.log(a-c-b) 请问输出的结果
var t = 10; function test(test){ t = t + test; console.log(t); var t = 3; } test(t); console.log(t); 运行结果是( )? A: 3 3 B: 3 10 C: NaN 10 D: NaN 3
var t = 10; function test(test){ t = t + test; console.log(t); var t = 3; } test(t); console.log(t); 运行结果是( )? A: 3 3 B: 3 10 C: NaN 10 D: NaN 3
$var 的值是多少? $var=1/2; 0 0.5 1
$var 的值是多少? $var=1/2; 0 0.5 1
var a = 10; { var a = 100; console.log(a)//(1) } console.log(a)//(2)
var a = 10; { var a = 100; console.log(a)//(1) } console.log(a)//(2)
以下哪几种定义函数的方式是正确的? A: function a() { alert(1); } B: function() { alert(1); } C: var a = function() { alert(1); } D: var a = new Function('alert(1);'); E: var a = (function() { return function() { alert(1); }})(); F: var a = function() { return function() { alert(1); }}();
以下哪几种定义函数的方式是正确的? A: function a() { alert(1); } B: function() { alert(1); } C: var a = function() { alert(1); } D: var a = new Function('alert(1);'); E: var a = (function() { return function() { alert(1); }})(); F: var a = function() { return function() { alert(1); }}();
var 1x = 1;
var 1x = 1;
设随机变量X的方差存在,Var(X)>0,则以下结论正确的是 A: Var(X) > Var(1-X) B: Var(X) < Var(1-X) C: Var(X) = Var(1-X) D: Var(X) + Var(1-X) = 1
设随机变量X的方差存在,Var(X)>0,则以下结论正确的是 A: Var(X) > Var(1-X) B: Var(X) < Var(1-X) C: Var(X) = Var(1-X) D: Var(X) + Var(1-X) = 1