第14题:[单选题]关于系统还原,错误的说法是______。 A. 系统还原主要功能是把操作系统恢复到以前某个时刻的状态 B. 系统还原的还原点既可以自动建立,也可以自行设定 C. 系统还原是把所有的数据文件恢复到以前某个时刻的状态 D. 系统还原后原则上不会丢失用户的数据文件 参考答案:C 所属章节:[信息安全与网络道德]
第18题: [单项选择]In which situation Indians wouldn’t use sign language according to the passage A. When they wanted to kill an enemy. B. When they wanted to identify a stranger. C. When they wanted to tell the time of the day. D. When they wanted to send a message to a person far away. 参考答案:A 答案解析:[听力原文]17-20
Sign language is a way of talking by using signs. Indians used sign language when th