3. 下列图示中,实验操作符合规范的是
<table><tr><td rowspan=1 colspan=2><img src="https://zebfdsytobcavmuynuhx.supabase.co/storage/v1/object/public/review-images/tasks/aeff1a9c-082d-4d69-beca-f10993d6a8fa/c6d700c7ca623af5.jpg"/> <img src="https://zebfdsytobcavmuynuhx.supabase.co/storage/v1/object/public/review-images/tasks/aeff1a9c-082d-4d69-beca-f10993d6a8fa/8ef68c0991fa8257.jpg"/></td></tr><tr><td rowspan=1 colspan=1>A. 除去水中氧气</td><td rowspan=1 colspan=1>B. 连接橡胶塞和试管</td></tr><tr><td rowspan=1 colspan=1><img src="https://zebfdsytobcavmuynuhx.supabase.co/storage/v1/object/public/review-images/tasks/aeff1a9c-082d-4d69-beca-f10993d6a8fa/36000f1bc4a46292.jpg"/></td><td rowspan=1 colspan=1><img src="https://zebfdsytobcavmuynuhx.supabase.co/storage/v1/object/public/review-images/tasks/aeff1a9c-082d-4d69-beca-f10993d6a8fa/d93aedd9e84b4551.jpg"/></td></tr><tr><td rowspan=1 colspan=1>C. 加热溶液</td><td rowspan=1 colspan=1>D. 向容量瓶中转移溶液</td></tr></table>
D