简述ROI的基本内涵。
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在访问列表中,有一条规则如下:access-list 131 permit ip any 192.168.10.0 0.0.0.255 eq ftp 在该规则中,any的意思是表示:()
A、检察源地址的所有bit位
B、检查目的地址的所有bit位
C、允许所有的源地址
D、允许255.255.255.255 0.0.0.0
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You are creating a Windows Forms application by using the .NET Framework 3.5. The application displays employee names by using the TreeView control. You need to implement the drag and drop functionality in the TreeView control.Which two actions should you perform?()
ASet theAllowDrag property to true.Create an event handler for the DragOver event.
BSet theAllowDrag property to true.Create an event handler for the ItemDrag event to call the DoDragDrop method.
CSet theAllowDrag property to true.Create an event handler for the DragEnter event to call the DoDragDrop method .
DCreate an event handler for the DragDrop event to handle the move or copy by itself.
ECreate an event handler for the DragEnter event to handle the move or copy by itself.
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将不同件的杂货装在同一集装箱内时,其重量应()
A、均匀分布
B、集中分布
C、轻货在下,重货在上
D、不需堆码