A.onFocus B.onClick C.onBlur D.onSelect
判斷程序運行完畢后,x,y,z值分別為() x="11"+1 y="11"&1 z="11"+"1"
A.111111111 B.1211112 C.12111111 D.121212
A.12 B.a?b C._abc D.ab_1