减肥可以吃什么东西:我应该把代码加在哪

下面是我网页的代码
body {
font-size: 12px;
font-family: Tahoma, Verdana, "宋体";
background-color: #CCCCCC;
background-position: top left;
background-repeat: repeat-x;
}
table,td {
font-family: Tahoma, Verdana, "宋体";
color: #000000;
font-size: 12px;
}
a:link,a:visited {
text-decoration: none;
color: #4073AB;
font-family: Tahoma, Verdana, "宋体";
}
a:hover {
text-decoration: underline;
color:#990000;
font-family: Tahoma, Verdana, "宋体";
}
hr {
height: 1px;
border: 1px solid #CCCCCC;
}
input {
border: 1px solid #C0C0C0;
padding-right: 1px;
padding-left: 1px;
padding-bottom: 1px;
padding-top: 1px;
font-family: Tahoma, Verdana, "宋体";
font-size: 11px;
color: #000000;
background-color: #FFFFFF;
}
textarea {
border: 1px solid #C0C0C0;
background-color: #FFFFFF;
font-family: Tahoma, Verdana, "宋体";
font-size: 12px;
color: #000000;
}
select {
font-family: Tahoma, Verdana, "宋体";
font-size: 11px;
color: #000000;
background-color: #FFFFFF;
}
.maintable {
width:768px;
border-color: #999999;
border-style: solid;
border-bottom-width: 0px;
border-right-width: 1px;
border-top-width: 0px;
border-left-width: 1px;
background-color: #F6F6F6;
}
.comment-text {
font-size: 11px;
color: gray;
}
.highlight {
text-decoration: underline;
color: red;
}
.page-header {
}
.page-header a:link {
color: black;
font-size: 24px;
font-weight: bold;
text-decoration: none;
}
.page-header a:visited {
color: black;
font-size: 24px;
font-weight: bold;
text-decoration: none;
}
.page-header a:hover {
color: #006400;
font-size: 24px;
font-weight: bold;
text-decoration: underline;
}
这些地方我试过了,保存错误.