单项选择题
A.throw B.try C.catch D.throws
A.在f()中a=x B.在f()中x=a C.在f()中x=x1 D.在g()中y=a
A."bang","Zoom","Moon" B."bangZoomMoon" C."bang"&"Zoom"&"Moon" D."bang"+"Zoom"+"Moon"