这是做的作业
<!DOCTYPE html>
<html lang="zh-cn">
<head><meta charset="UTF-8"><title>Title</title><style>.pics {width: 1850px;height: 700px;display: flex;justify-content: center; /* 水平居中 */align-items: center; /* 垂直居中 */background-color: gray;margin: 500px 50px;/*margin-top: 300px;*/.p1 {width: 425px;height: 425px;border: 1px solid black;/*text-align: center;*/margin-right: 20px;}.p2 {width: 425px;height: 425px;border: 1px solid black;/*text-align: center;*/margin-right: 20px;}.p3 {width: 425px;height: 425px;border: 1px solid black;/*text-align: center;*/margin-right: 20px;}.p4 {width: 425px;height: 425px;border: 1px solid black;/*text-align: center;*/margin-right: 20px;}}</style>
</head>
<body>
<div class="pics" ><img src="./1.gif" alt="pic1" class="p1"><img src="./2.gif" alt="pic2" class="p2"><img src="./3.gif" alt="pic3" class="p3"><img src="./4.gif" alt="pic4" class="p4">
</div>
</body>
</html>
