A、<span style=";font-family:宋体;font-size:14px">死机</span></p><p></p>
B、<span style=";font-family:宋体;font-size:14px">命令正常执行</span></p><p></p>
C、<span style=";font-family:宋体;font-size:14px">命令不执行</span></p><p></p>
D、<span style=";font-family:宋体;font-size:14px">命令执行，提示“直线平行”，然后退出命令</span></p><p></p>