（单选题）
Which statement is true about mouse events? （）
AThe cursor style can be set to CAUTION.
BDouble-clicking a mouse button can potentially fire six mouse event triggers.
CThe values for the SYSTEM.MOUSE_BUTTON_PRESSED system variable can only be 1 or 2.
DClick and double-click button actions can only detect if the mouse is positioned in an item.
正确答案
答案解析
略
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