let myArray=[11,22,33]; console.log('原数组:',myArray); myArray.push(44,55); console.log('用push在数组后面插入元素:',myArray); myArray.unshift(66,77); console.log('用unshift在数组前面插入元素:',myArray); myArray.splice(2,0,'肾虚少年'); console.log('用splice在数组指定位置插入元素:',myArray);