A.id B.href C.title D.x
var o = new Object; o.name = "David"; alert(o.name); delete o.name; 對(duì)這段腳本解釋正確的是()
A.創(chuàng)建一個(gè)對(duì)象 B.刪除了name屬性 C.將name強(qiáng)制設(shè)置為undefined D.再獲取name值會(huì)報(bào)錯(cuò)
A.str.replace(/([a-c])/g,’’) B.str.replace(/(\d)/g,’[$1]’) C.str.replace(/(\d)/g,function(num){returnnum*2;}) D.str.replace(/([a-c])/g)