曼彻斯特编码是将（）。

A、数字数据转换为数字信号

B、模拟数据转换为数字信号

C、数字数据转换为模拟信号

D、模拟数据转换为模拟信号

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• The validate_password plugin is loaded and displays the following settings in global variables: Mysql＞ SHOW VARIABLES LIKE ‘validate_password%’; When attempting to set your password, you get the following error: Mysql＞ SET PASSWORD = PASSWORD (‘Hoverl@%’); ERROR 1819 (HY000): Your password does not satisfy the current policy requirements What is the cause of the error?（）

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