Be careful when you cross the road in rush hours so as to avoid       by a car．

A．being knocked down

B．knocking down

C．to be knocked down

D．to knock down

事业部制结构遵循的主要原则是（）.

A.集中决策，分散投资

B.集中决策，分散经营

C.组织结构服从战略

D.以成果为中心