6.某网站要求会员在注册账号时,用户名必须由字母、数字与下划线组成。在VB中,若用变量u name存储该用户名,其数据类型应定义为(A. IntegerB. Single
"05":"用户名只能用英文、数字及下划线!","06":"用户名长度为4-15个字符!","07":"密码不能为空!","08":"用户名长度为4-20个字符!","09":"密码强度弱","10":"密码强度中","11":"密码强度强","12":"确认密码不能为空!","13":"确认密码不一致",...