The error message is given below.
/* Did you set the first paragraph's font-size to 10px? It looks like it's 12px. (If you're getting a weird decimal font size, check the Hint.)*/
写的应该正确~
<!DOCTYPE html>
<html>
<head>
<title>First font size change</title>
</head>
<body>
<p style="font-size: 10px">Some text for you to make normal size! </p>
<p style="font-size: 20px"> Some text for you to make normal size!</p>
<p style="font-size: 40px"> Some text for you to make super big!</p>
</body>
</html>
<html>
<head>
<title>First font size change</title>
</head>
<body>
<P style="font-size: 10px"> Some text for you to make tiny! </p>
<p style="font-size: 20px"> Some text for you to make normal size!</p>
<p style="font-size: 40px"> Some text for you to make super big!</p>
</body>
</html>