架空电力线路使用的线材，绝缘线表面应（）均匀，绝缘层厚度应符合规定。
A、平整
B、光滑
C、色泽
D、光洁
参考答案：A, B, C
Animals often try to hide or run away when they .[ ]
A. have been attacked
B. will attack
C. have attacked
D. are being attacked
“鄙人”是用来称呼谁的？
