Why ship repair is an inherently difficult business to manage in the conventional sense?
A.
Because it is difficult to plan and manage
B.
Because it is cannot be well categorized
C.
Because it is a difficult work for people to undergo
D.
Because it is seldom researched by researcher为什么从传统意义上看修船生来是一宗难于管理的事务?因为它难以计划和管理。