jq如何獲取數(shù)組集合？

<table><tbody><tr><td>1</td><td><span class="pit" id="bel1">2</span></td><td>3</td></tr><tr><td><span class="pit" id="bel2">3</span></td><td>2</td><td>1</td></tr><tr><td>2</td><td>1</td><td><span class="pit" id="bel3">3</span></td></tr></tbody></table>