DOM方式操作SML涉及的基本类有:Document,Node,Nodelist,Element和()
A.Attribute
B.View
C.Menu
D.attr
参考答案:D
He caught the thief with the collar and dragged him to the nearest police station.
施闸手柄,活塞,重锤的工作行程都不得超过容许行程的()。
A.0%;
B.80%;
C.二分之一;
D.四分之三。