打磨头前进时砂袋的搭接量是()mm。
A、5-15
B、5-10
C、10-20
D、10-25
参考答案:A
It is said that the people of Shandong Province are the most __________in helping others.
A.general
B.generous
C.gentle
D.positive
油系统着火后,运行人员应如何处理?