问题
单项选择题
Password is a secret series of (73) that enables a user to access a file, computer, or program. On multi-user systems, each user must enter his or her password before the computer will respond to (74) . The password helps ensure that (75) users do not access the computer. In addition, data files and programs may require a password.
A. powerB. authorized C. accreditD. unauthorized
答案
参考答案：D
解析：密码是一个具有秘密特性的字符串，它能够使用户访问文件、计算机或程序，在多用户系统中，每个用户在计算机执行其命令前必须键入他(她)的密码。密码帮助保护未经授权的用户不能访问该计算机。另外，数据文件与程序也可能需要密码。