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<head>
<title>枚举字符串</title><body><table border=1 id="tb1">
<tr id="tr1"><td align="center">课程</td><td align="center">学时</td><td align="center">成绩</td></tr>
<tr id="tr1"><td align="center">课程1</td><td align="center">60</td><td align="center">85</td></tr>
<tr id="tr1"><td align="center">课程2</td><td align="center">20</td><td align="center">78</td></tr>
<tr id="tr1"><td align="center">课程3</td><td align="center">30</td><td align="center">98</td></tr>
<tr id="tr1"><td align="center">课程4</td><td align="center">40</td><td align="center">89</td></tr>
<tr id="tr1"><td align="center">课程5</td><td align="center">50</td><td align="center">70</td></tr></table>
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