问题
单项选择题
Password is a secret series of (69) 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 (70) . The password helps ensure that (71) users do not access the computer. In addition, data files and programs may require a password.
A．order
B．commands
C．instruction
D．tracks
答案
参考答案：B
解析：题意为“计算机响应命令”。Instruction意思为“指令”。Command意思为“命令”。