关于JavaScript中数组的说法，不正确的是（）关于Javascript中数组的说法中，不正确的是：（）
A. 数组的长度必须在创建时给定，之后便不能改变。
B. 把同类数据元素按序排列的集合就构成了数组
C. 由于数组是对象，因此创建数组需要使用new关键字
D. 数组可以在声明的同时进行初始化
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循环三要素为（）
A. 循环条件
B. 循环类型
C. 循环体
D. 循环增量
节点的最后一个儿子节点是（）
A.
B.
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