In the service of knowledge, scientists also train the most skilled component of the work
A. in no cases
B. in a case
C. at no cost
D. at a cost
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在Windows2000的资源管理器中按下()键不放单击文件图标，可同时选定多个连续的文件。
A. Shift
B. Ctrl
C. Alt
D. Tab
That community must now lead extensive reform. of the region's universities and scientific
A. entrench
B. entrench themselves
C. may entrench
D. may entrench themselves
在“智能ABC”输入法状态下，按()组合键在中文标点和英文标点之间进行切换。
A. Shift+Space
B. ShiK+Ctrl
Ctrl+．(句号)
D. Ctrl+Space
在Excel工作表的单元格A5中有公式“=B$3+C1”，将A5单元格的公式复制到C7单元格内，则C7单元格内的公式是()。
A. =B$5+E3
B. =D$3+C1
C. =D$3+E3
D. =D$5+E3
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