单项选择题
Which built-in allows you to update the screen display to reflect the information that Forms has in its internal representation of the screen? （）
A.SYNCHRONIZE B.UPDATE_FORM C.SYNCHRONIZE_FORM D.GET_MEMORY_DISPLAY E.SET_MEMORY_DISPLAY
单项选择题 Howcanyoumodifytheapplicationtoreturnmoremeaningfulerrormessagestotheuser?（）
单项选择题 Whenarepeatingtimerexpires,（）.
单项选择题 AsanalternativetosettingtheVisiblepropertytoNofortheORDERS_WINDOW,whichbuilt-incouldyouusetoachievethesameresult?（）
