问题描述：
[多选]
Which two are true regarding MySQL binary and text backups？（）关于MySQL的二进制和文本备份，哪两个是正确的？
A．Binary backups are usually faster than text backups.
B．Binary backups are usually slower than text backups.
C．Text backups are human-readable while binary backups are not. 文本备份是人类可读的，而二进制备份则不是。
D．Binary backups are not portable across different operating systems.(平台抑制) 二进制备份不能跨不同的操作系统移植。
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上一篇：Assume that you want to know which MySQL Server options were set to custom values．Which two methods would you use to find out？（）假设您想知道哪些MySQL服务器选项被设置为固定值。哪个你会用两种方法来找出答案？
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