单项选择题
下面代码的输出是什么?() var a = 3; var b = new Number; var c = 3; console.log(a == b); console.log(a === b); console.log(b === c);
A.true false true B.falsefalse true C.true false false D.false true true
下面代码的输出是什么?() let c = { greeting: "Hey!" }; let d; d = ...
下面代码的输出是什么?() let c = { greeting: "Hey!" }; let d; d = c; c.greeting = "Hello"; console.log(d.greeting);
A.Hello B.undefined C.ReferenceError D.TypeError
下面代码的输出是什么?() +true; !"Lydia";A.1 and falseB.false and ...
下面代码的输出是什么?() +true; !"Lydia";
A.1 and false B.false and NaN C.false and false
以下ECMAScript变量命名格式正确的是()A._125dollorB.1207AC.-dollorD.T...
单项选择题以下ECMAScript变量命名格式正确的是()
A._125dollor B.1207A C.-dollor D.This