四、添加声音与视频
<p>4-1 添加视频
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=81af58a2a4a3e945ba24bcf7a8741590&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=01d2089fcfd7ca80bd3138a2f19944bb&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=50e9f4b1aa6d858ea2c7b142ab86ad7e&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=168d7a5c0185b6bf38b330bbb49e29a3&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=d0103cb8f5b5709b077ffc93cc7959f8&amp;file=file.png" alt="" />
4-2 添加音乐
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=6a6470640424d262497c0feeedd9c677&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=0121ac6fa4b2fdd25d0d55809faaf7cc&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=a6d68feb8ff0a127c912bfb2c6bf5e78&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=425df133f79cbbf6698db21d025fea96&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=a5044fd7bf87e8b6cdb34f749f326ed2&amp;file=file.png" alt="" />
4-3 添加背景音乐
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=dfaf0abe50a65aee43d2a0e11f593fd3&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=ec54bc1c7a72974d73b809c3e6790f39&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=fc067ae21d3b1987ce63a1376f7dd805&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=95e247809814a1e0817595ffb42b5fcc&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=a6d0c23cc20308a5f6e6f59122fbf7c7&amp;file=file.png" alt="" />
<img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=104d00adcc5d8d16c96fd19ee310ab1b&amp;file=file.png" alt="" /></p>