A.Itacceptsbothabuilt-inandakeynameasargument.
B.Ifnokeytriggerisdefined,thespecifiedbuilt-inexecutes.
C.Itsparametermustbespecifiedinuppercase,enclosedinsinglequotationmarks.
D.Itperformsthesametaskasifyoupressedthefunctionkeyassociatedwiththespecifiedargument.
E.Itexecutesthekeytriggerthatcorrespondstothebuilt-inspecifiedasitsparameter.
正确答案：参考B, D, E
