过境动物的尸体、排泄物、铺垫材料以及其他废弃物,不得擅自抛弃。()
参考答案:对
改错。
( ) 1. This is a women. ________________
A B C D
( ) 2. These are many child. ________________
( ) 3. He is a old man. ________________
( ) 4. These is many pencils. ________________
电机润滑脂向外泄漏,应该检查()是否完好。
A、填料函
B、平衡管
C、轴封
D、轴套