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[习题1.10] 设a+b+c=0，|a|=3，|b|=1，|C|=4，求a·b+b·c+c·a。
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【单选题】You are the administrator of a Windows 2000 Server computer. A folder named HR-Data on the system partition of the server is shared on the network as HR-Data. The owner of the HR-Data folder is Admini...
A.
Grant yourself Full Control permission for only the HR-data folder and not its subobjects. Delete the file. Then remove Full Control permission for HR-Data folder.
B.
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Take ownership of the file. Grant yourself Modify permission for the file. Delete the file.
D.
Grant yourself Modify permission for the HR-Data folder and its subobjects. Delete the file. Then remove Modify permission for the HR-Data folder.
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