对一台钻机，从拆卸、修理到组装试验等全部由一个班组完成称为（）。
A.专业修理法
B.包车修理法
C.总成互换修理法
D.全程修理法
参考答案：B
China won't be a fast-growing but fragile country. It has to develop it's military strength in order to make
any power think twice _____ trying to offend China's key interests. [ ]
A. before
B. when
C. while
D. until
事后维修的优、缺点有哪些？
