神仙题

foo(1)
function foo(i) {
if (i == 4) {return}
console.log('fb', i)
foo(i + 1)
console.log('fe', i)}

//fb 1
VM966:4 fb 2
VM966:4 fb 3
VM966:6 fe 3
VM966:6 fe 2
VM966:6 fe 1

 第二题

var obj = {
  fn2: function () { //此处的fn2。是obj的属性
    console.log(fn2) //此处的fn2为变量
  }
}
obj.fn2() 

 第三题（难度大 闭包）

https://www.cnblogs.com/ViavaCos/p/11511171.html