5-海员培训四小证要多长时间？要花多少钱？[海员知识36问_2023版]
https://onvideo.ssrcdn.com/bs2/onVideo/skyfall/media/34252206562880495723083.mp4 腾讯https://v.qq.com/x/page/i3500aj6yxk.html
公众号
https://mp.weixin.qq.com/s/IjGAru1Z2btuz1RNqALIcA
今日头条
https://www.ixigua.com/i7205531279746400802/
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https://haokan.baidu.com/v?vid=4684004264996661531
美篇
https://www.jianpian.cn/a/8p3qk46
一点号
https://www.yidianzixun.com/article/V_1aPNLVWg
优酷
https://v.youku.com/v_show/id_XNTk0NjQ3MjY0OA==.html
56视频
http://www.56.com/u91/v_MTgyMzc2OTEy.html
哔哩哔哩
https://www.bilibili.com/video/BV1kg4y1E7qK/?spm_id_from=333.999.0.0
搜狐
https://tv.sohu.com/v/dXMvMzY1NjQ1Njk5LzQyNjUzOTI5NS5zaHRtbA==.html
爱奇艺
https://www.iqiyi.com/v_ol05qu33c0.html
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