单选题:执行USE命令的作用是( )。 题目分类:VF 题目类型:单选题 查看权限:VIP 题目内容: 执行USE命令的作用是( )。 A.关闭所有工作区的数据表文件 B.关闭当前工作区的数据表文件 C.关闭所有文件 D.对数据表文件没有影响 参考答案: 答案解析:
可以通电检验的条件包括( )。 可以通电检验的条件包括( )。A.建筑物全部装修完成 B.受电系统二次回路试验合格 C.保护定值按设计要求整定完毕 D.受电系统的设备和电缆等绝缘良好 E.具 分类:VF 题型:单选题 查看答案
How can quantum dots be used to confirm diseases? How can quantum dots be used to confirm diseases?A.By traditionally looking at a 分类:VF 题型:单选题 查看答案
Prometheus Books plan to publish the book The Father Factor Prometheus Books plan to publish the book The Father Factor next month.A.Right 分类:VF 题型:单选题 查看答案
I want to provide my boys with a decent education. I want to provide my boys with a decent education.A.special B.good C.private D.g 分类:VF 题型:单选题 查看答案
There was a profound silence after his remark. There was a profound silence after his remark.A.short B.deep C.proud D.sudden 分类:VF 题型:单选题 查看答案