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.

3（）

A．each

B．all

C．some

D．any

选择和改编婴幼儿粗大动作游戏的（）要符合婴幼儿粗大动作发展的年龄特点。

A.方法

B.原则

C.内容

D.形式