问答题

关于输入文本型数据，下列说法正确的是( )

A.字母，汉字可直接输入
B.编辑栏中的输入按钮不能用来确认数据
C.如果输入首字符是等号，则必须先输入一个双引号
D.上述四种说法均正确
E.如果输入的是文本型数字，则必须先输入一个单引号

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单项选择题

Youhaveareadonlytablespaceonreadonlymedia.Youwanttoperformamediarecoveryontheexistingdatafiles，butusingabackupcontrolfile.Thebackupcontrolfileindicatesthatthestatusofthereadonlytablespacewasread/writewhenthecontrolfilewasbackedup.Whatshouldyouconsider？（）
A.dropthereadonlytablespaceandrecreatethetablespaceafterrecovery
B.takedatafilesfromthereadonlytablespaceofflinebeforeperformingarecovery
C.performarecoverystatusofthetablespaceincontrolfilewillbechangedautomatically
D.recoveryusingbackupcontrolfileisnotpossible，sorestoreallthefilesfromthelastfulldatabasebackup，andthenopenthedatabase

A.Youwanttoperformamediarecoveryontheexistingdatafiles，butusingabackupcontrolfile.Thebackupcontrolfileindicatesthatthestatusofthereadonlytablespacewasread/writewhenthecontrolfilewasbackedup.Whatshouldyouconsider？（）
A.dropthereadonlytablespaceandrecreatethetablespaceafterrecovery
B.takedatafilesfromthereadonlytablespaceofflinebeforeperformingarecovery
C.performarecoverystatusofthetablespaceincontrolfilewillbechangedautomatically
D.recoveryusingbackupcontrolfileisnotpossible，sorestoreallthefilesfromthelastfulldatabasebackup，andthenopenthedatabase

选取Excel2003当前工作表中的所有单元格的方法是( )。

A.按Ctrl+A键
B.单击工具栏中相应的按钮
C.单击“全选”按钮
D.按Ctrl+E键
E.使用“编辑”菜单的“全选”命令