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<!DOCTYPE html>
<html>
<head>
<style>
span.a {
  display: inline; /* the default for span */
  width: 100px;
  height: 100px;
  padding: 5px;
  border: 1px solid blue;  
  background-color: yellow; 
}

span.b {
  display: inline-block;
  width: 100px;
  height: 100px;
  padding: 5px;
  border: 1px solid blue;    
  background-color: yellow; 
}

span.c {
  display: block;
  width: 100px;
  height: 100px;
  padding: 5px;
  border: 1px solid blue;    
  background-color: yellow; 
}
</style>
</head>
<body>

<h1>display 属性</h1>

<h2>display: inline</h2>
<div>Shanghai is one of the four direct-administered municipalities of <span class="a">the People's Republic of China</span>. Welcome to <span class="a">Shanghai</span>!</div>

<h2>display: inline-block</h2>
<div>Shanghai is one of the four direct-administered municipalities of <span class="b">the People's Republic of China</span>. Welcome to <span class="b">Shanghai</span>!</div>

<h2>display: block</h2>
<div>Shanghai is one of the four direct-administered municipalities of <span class="c">the People's Republic of China</span>. Welcome to <span class="c">Shanghai</span>!</div>

</body>
</html>

W3School TIY Editor