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. power
B. authorized
C. accredit
D. unauthorized