css - 手机端响应式布局时，图片设置width=100%后，还有设置display：block才能实现自适应？
求解
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0,minimum-scale=1.0, maximum-scale=1.0,user-scalable=no">
<title>移动端</title>
<style>
img {display: block; max-width: 100%;
}
</style>
</head>
<body>
<img src="img/tour1.jpg" alt="">
</body>
</html>
