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多項選擇題

Which two statements are true about mouse button variables?()

A.SYSTEM.MOUSE_BUTTON_PRESSED returns a string. 
B.SYSTEM.MOUSE_BUTTON_PRESSED returns a numeric value. 1Z0-132 World Leaders In Certifications Material - Test-king.com 
C.A possible value for SYSTEM.MOUSE_BUTTON_MODIFIERS is Control+Alt+Delete. 
D.SYSTEM.MOUSE_BUTTON_MODIFIERS can only be references in form-level triggers. 
E.SYSTEM.MOUSE_BUTTON_MODIFIERS identifies which special key was pressed in conjunction with the usual mouse button action. 

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