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.

2（）

A．access

B．accessing

C．accessed

D．to access

并网协议，是双方或多方当事人的一种法律行为。根据《电力法》第二十条的规定，应当按（）的原则签订并网协议，确定双方的权利和义务。

A.统一调度、分级管理

B.统一调度、统一管理

C.平等互利、协商一致

D.电网用户服从电网企业要求