密码系统主要是防止非授权用户的非法进行，只有合法的用户在验证后才能进行测试和其它一些操作，比如查看数据等，增加系统和测试数据的安全性。-Password system to prevent unauthorized users from illegal carried only legitimate users to verify the test and some other operations, such as viewing data, and to increase the secur