Which statement is true about mouse events? （）<br>A:The cursor style can be set to CAUTION. <br>B:Double-clicking a mouse button can potentially fire six mouse event triggers. <br>C:The values for the SYSTEM.MOUSE_BUTTON_PRESSED system variable can only be 1 or 2. <br>D:Click and double-click button actions can only detect if the mouse is positioned in an item.

Which statement is true about mouse events? （）
A:The cursor style can be set to CAUTION.
B:Double-clicking a mouse button can potentially fire six mouse event triggers.
C:The values for the SYSTEM.MOUSE_BUTTON_PRESSED system variable can only be 1 or 2.
D:Click and double-click button actions can only detect if the mouse is positioned in an item.

出自：Oracle认证

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