```js <div class="container"> <div class="left"></div> <div class="right"></div> </div> <style> * { padding: 0; margin: 0; } .container { width: 600px; height: 300px; display: flex; } .left { flex: 1 2 300px; background: red; } .right { flex: 2 1 200px; background: blue; } </style> ``` 注:此题和 155 题 left、right 样式有些不同