https://developer.mozilla.org/en-US/docs/Learn/HTML/Tables/Structuring_planet_data 给了我一组关于太阳系行星的数据，用学到的 HTML 知识画一个表格。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Planets data</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<h1>Planets data</h1>
<table>
<caption>
Data about the planets of our solar system (Planetary facts taken from
<a href="http://nssdc.gsfc.nasa.gov/planetary/factsheet/"
>Nasa's Planetary Fact Sheet - Metric</a
>).
</caption>
<colgroup>
<col span="2" />
<col style="border: 2px solid black" />
<col span="9" />
</colgroup>
<thead>
<tr>
<td colspan="2"> </td>
<th scope="col">Name</th>
<th scope="col">Mass (10<sup>24</sup>kg)</th>
<th scope="col">Diameter (km)</th>
<th scope="col">Density (kg/m<sup>3</sup>)</th>
<th scope="col">Gravity (m/s<sup>2</sup>)</th>
<th scope="col">Length of day (hours)</th>
<th scope="col">Distance from Sun (10<sup>6</sup>km)</th>
<th scope="col">Mean temperature (°C)</th>
<th scope="col">Number of moons</th>
<th scope="col">Notes</th>
</tr>
</thead>
<tbody>
<tr>
<th rowspan="4" colspan="2" scope="rowgroup">Terrestrial planets</th>
<th scope="row">Mercury</th>
<td>0.330</td>
<td>4,879</td>
<td>5427</td>
<td>3.7</td>
<td>4222.6</td>
<td>57.9</td>
<td>167</td>
<td>0</td>
<td>Closest to the Sun</td>
</tr>
<tr>
<th scope="row">Venus</th>
<td>4.87</td>
<td>12,104</td>
<td>5243</td>
<td>8.9</td>
<td>2802.0</td>
<td>108.2</td>
<td>464</td>
<td>0</td>
<td></td>
</tr>
<tr>
<th scope="row">Earth</th>
<td>5.97</td>
<td>12,756</td>
<td>5514</td>
<td>9.8</td>
<td>24.0</td>
<td>149.6</td>
<td>15</td>
<td>1</td>
<td>Our World</td>
</tr>
<tr>
<th scope="row">Mars</th>
<td>0.642</td>
<td>6,792</td>
<td>3933</td>
<td>3.7</td>
<td>24.7</td>
<td>227.9</td>
<td>-65</td>
<td>2</td>
<td>The red planet</td>
</tr>
<tr>
<th rowspan="4" scope="rowgroup">Jovian planets</th>
<th rowspan="2" scope="rowgroup">Gas giants</th>
<th scope="row">Jupiter</th>
<td>1898</td>
<td>142,984</td>
<td>1326</td>
<td>23.1</td>
<td>9.9</td>
<td>778.6</td>
<td>-110</td>
<td>67</td>
<td>The largest planet</td>
</tr>
<tr>
<th scope="row">Saturn</th>
<td>568</td>
<td>120,536</td>
<td>687</td>
<td>9.0</td>
<td>10.7</td>
<td>1433.5</td>
<td>-140</td>
<td>62</td>
<td></td>
</tr>
<tr>
<th rowspan="2" scope="rowgroup">Ice giants</th>
<th scope="row">Uranus</th>
<td>86.8</td>
<td>51,118</td>
<td>1271</td>
<td>8.7</td>
<td>17.2</td>
<td>2872.5</td>
<td>-195</td>
<td>27</td>
<td></td>
</tr>
<tr>
<th scope="row">Neptune</th>
<td>102</td>
<td>49,528</td>
<td>1638</td>
<td>11.0</td>
<td>16.1</td>
<td>4495.1</td>
<td>-200</td>
<td>14</td>
<td></td>
</tr>
<tr>
<th colspan="2" scope="rowgroup">Dwarf planets</th>
<th scope="row">Pluto</th>
<td>0.0146</td>
<td>2,370</td>
<td>2095</td>
<td>0.7</td>
<td>153.3</td>
<td>5906.4</td>
<td>-225</td>
<td>5</td>
<td>
Declassified as a planet in 2006, but this
<a
href="http://www.usatoday.com/story/tech/2014/10/02/pluto-planet-solar-system/16578959/"
>remains controversial</a
>.
</td>
</tr>
</tbody>
</table>
</body>
</html>
html {
font-family: sans-serif;
}
table {
border-collapse: collapse;
border: 2px solid rgb(200,200,200);
letter-spacing: 1px;
font-size: 0.8rem;
}
td, th {
border: 1px solid rgb(190,190,190);
padding: 10px 20px;
}
th {
background-color: rgb(235,235,235);
}
td {
text-align: center;
}
tr:nth-child(even) td {
background-color: rgb(250,250,250);
}
tr:nth-child(odd) td {
background-color: rgb(245,245,245);
}
caption {
padding: 10px;
}
#思考
HTML 中的表格是一个强大的工具，它能够以直观的形式显示数据。通过以上练习，我使用了 table , caption , colgroup , col , thead , tbody , tr , th , td 元素，并用到了 span , colspan , rowspan , scope 属性。