当我通过浏览器看到它时,我在表格前面看到了四个空行.他们在哪里以及如何删除它们？
<body>
<table>
<tr><td> Subject name:* </td><td> <input type="text" name="subject_name"></td></tr>
<br>
<tr><td> Code of subject: </td><td> <input type="text" name="subject_code"></td></tr>
<br>
<tr><td> Description:*</td><td><input type="text" name="descriptions"></td></tr>
<br>
<tr><td> Teacher:*</td><td><input type="text" name="teacher"></td></tr>
<br>
<tr><td> Link:</td><td><input type="text" name="href"></td></tr>
<br>
<tr><td> University:*</td><td><select id="continent" name="university" onchange="countryChange(this);">
<option value="empty">Select a university</option>
<option value="Chech technical university (CVUT)">Chech technical university (CVUT)</option>
<option value="Charles university (UK)">Charles university (UK)</option>
<option value="MIT">MIT</option>
<option value="Harvard">Harvard</option>
</select> </tr>
</table>
</body>
谢谢