题目内容

Excel 2010工作簿文件的默认扩展名是（）。

A. xslx
B. xlsx
C. fslx
D. xls

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在Excel2010工作表中，“A6：F12”表示（）

A6和F12单元格
B. A6或F12单元格
C. A6和F12单元格以及它们之间的所有单元格
D. 以上都不是

They were abroad during the months when we were carrying out the investigation, or they _____ to our help.

A. would have come
B. could come
C. have come
D. had come

David has never been to Rome, but he talks about it as if he _____ there himself.

A. has been
B. had been
C. is
D. were

Tom was absent from the party. Otherwise, he _____ wonderful programs.

A. must perform
B. would perform
C. must have performed
D. would have performed