填空题

( )恢复一个文件 ( )允许入网

【参考答案】

N、G
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单项选择题
A．The bus has broken down.B．The bus has fallen off a bridge.C．The bus has been fired.D．The bus has been held up.
A．The bus has broken down.
B．The bus has fallen off a bridge.
C．The bus has been fired.
D．The bus has been held up.
填空题
( )删除文件 ( )按ESC退出系统
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