土方开挖前应制定专项施工方案。采用多台挖土机同时开挖基坑时，挖土机之间的距离应大于( )m。
A．4
B．6
C．8
D．10
参考答案：D
Comrade Lei Feng often thought more of ____ than himself. [ ]
A. other
B. the other
C. others
D. another
等速送丝式埋弧焊机的特点？
