div><div class="col-md-12 col-lg-9"><div><h3>选择工具</h3><p><iframe loading="lazy" width="560px" height="350px" src="https://www.youtube.com/embed/j28BwvPO5gE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p><h4>允许你拉伸、旋转、或倾斜选择。</h4><p>用来选择整个对象。你可以通过点击目标对象或在对象周围拖动一个矩形来选择多个对象�