对220～500kV线路带电作业进行绝缘配合时，确定安全距离和绝缘工具的有效长度以大气过电压为主
参考答案：错
The bank, whose walls are painted white, ________a safe and reliable place.
A．is thought as
B．is thought of as
C．is thought of to be
D．is thought of
一棵二叉树第六层(根结点为第一层)的结点数最多为 【5】 个。
