版本：
文件：
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/content-tools.js
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/content-tools.min.css
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/content-tools.min.js
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/images/drop-horz.svg
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/images/drop-vert-above.svg
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/images/drop-vert-below.svg
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/images/icons.woff
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https://cdn.bootcdn.net/ajax/libs/ContentTools/1.6.16/images/video.svg