You are creating a Windows Forms application by using the .NET Framework 3.5. You plan to develop a new control for the application.You need to ensure that the control extends the TreeView control by adding a custom node tag and a highlight color.What should you do?()
A. Override the OnPaint method.
B. Write a code segment in the DrawNode event handler to specify the highlight color.
C. Set the DrawMode property of the control to OwnerDrawAll, and then implement a custom DrawNode event handler.
D. Set the DrawMode property of the control to OwnerDrawText,and then implement a custom DrawNode event handler.
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可以使用越级上行文的情况有()
A. 发生战争或严重自然灾害
B. 经多次请示直接的上级机关3て诿坏玫浇饩龅奈侍
C. 对直接上级机关进行检举、控告的问盾
D. 直接上下级机关或者领导之间有争议而无法解决的问题
E. 询问与联系极个别的具体问题
登高作业中,下面哪些说法正确()。
A. 严禁高空抛物
B. 严禁上抛下投
C. 工具物品必须放在口袋内防止掉落
D. 严禁系安全带