摘要：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>我的作業(yè)</title></head><body><script>var a=3,b=4;var c='php中文網(wǎng)',d="Hell
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>我的作業(yè)</title>
</head>
<body>
<script>
var a=3,b=4;
var c='php中文網(wǎng)',d="Hello!php";
document.write("a="+a+'<br>'+"a+b="+(a+b));
document.write('<br>'+c+d);
</script>
</body>
</html>
批改老師：天蓬老師批改時(shí)間：2019-03-01 13:09:00
老師總結(jié)：var a=3,b=4;
var c='php中文網(wǎng)',d="Hello!php";
document.write("a="+a+'<br>'+"a+b="+(a+b));
document.write('<br>'+c+d);
有二個(gè)問(wèn)題:
1. 應(yīng)該始終堅(jiān)持 一行只聲明一個(gè)變量;
2. 應(yīng)該將結(jié)果輸出到