A.正确B.错误冷备份的优点是在大多数情况下数据库可在工作时恢复。……

单项选择题热备份是在数据库运行的情况下，备份数据库的方法。所以，如果你有昨天夜里的一个冷备份而且又有今天的热备份文件，在发生问题时，就可以利用这些资料恢复更多的信息。

未分类题Some psychologists maintain that mental acts such as thinking are not performed in the brain alone, but that one's muscles also participatE.It may be said that we think with our muscles in somewhat the same way that we listen to music with our bodies.You surely are not surprised to be told that you usually listen to music not only with your ears but with your whole body. Few people can listen to music that is more or less familiar without moving their body or more specifically, some part of their body. Often when one listens to a symphonic concert on the radio, he is tempted to direct the orchestra even though he knows them is a competent conductor on the joB.Strange as this behavior. may be, there is a very good mason for it. One cannot derive all possible enjoyment from music unless he participates, so to speak, in its performancE.The listener 'feels' himself into the music with more or less noticeable motions of his body.The muscles of the body actually participate in the mental process of thinking in the same way, but this participation is less obvious because it is less noticeablE.Some psychologists maintain that thinking is ______.A.not a mental processB.more of a physical process than a mental actionC.a process that involves our entire bodiesD.a process that involves the muscles as well as the brain

未分类题Customer: Excuse me, sir. Clerk: ______. Customer: I'd like to cash a check. Would you please tell me which window should I go to? Clerk: You can cash checks over there at window 6.A.What? Can I help you?B.Yes, may I help you?C.It's all right.D.It doesn't matter.

单项选择题可以将非关系型数据库中的数据导入MySQL中。

未分类题Roger: Hurry up! We don't have much time left. Dick: ______. We still have two hours. Roger: Come on! This is my first time ever to take a planE.I don't want anything to go wrong.A.Go onB.Take it easyC.All rightD.Look out

多项选择题弗雷德曼方程表明宇宙的膨胀主要由下列哪几项所驱动 A. 宇宙学常数项 B. 涨落项 C. 曲率项 D. 实物组分项 E. 辐射组分项

未分类题表达式Str(Len('123'))+Str(77)的值是( )。D.12377.7

单项选择题下列关于船舶实际航速表述正确的是____。 A. 船舶在风流影响下单位时间内的对地实际航程 B. 计程仪指示的船舶运动速度 C. 计程仪航速与流速之和 D. 对水航速与流速之和

未分类题窗体上添加一个文本框Text1，编写如下代码： Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer) Print Chr(KeyCode+5) & KeyCode End Sub 程序运行时，在文本框中输入“ab”，则在窗体上输出为( )。A.F65 G66B.F65 F66C.G66 F65D.G65 G66

未分类题窗体上有一个图片控件和一个按钮控件，下列程序执行的结果是( )。 Private Sub Commandl_Click() Picturel.Picture=LoadPicture('c： picturE.jpg') Picmrel.Cls Picturel.Print 'picture' End SubA.窗体无显示，图片框显示图片和文字pictureB.窗体上出现picture文本，图片框无显示C.窗体上出现picture文本，图片框显示图片picturE.jpgD.窗体无显示，图片框只显示picture文字