管理者是()。

A、不需要补偿的雇员

B、为实现组织目标协调工作活动的人

C、组织的首脑

D、一线工人

Password is a(n) (1) series of characters that enables a user (2) a file, computer or program. On multi - user systems, (3) user must enter his or her password (4) the computer will respond to commands. The password helps ensure that unauthorized users do not access the computer. In addition, data files and programs may require a password.

Ideally, the password should be something (5) could guess. In practice, most people choose a password that is easy to remember, such as their name or their initials. This is one reason it is relatively easy to break into most computer system.

4（）

A．after

B．when

C．while

D．before