A:人切断电源和检修线路是流程中的两个环节
B:减少切断电源环节,优化了流程的工期
C:切断电源和线路检修的先后顺序是流程的时序
D:本案例中流程的时序是不可颠倒的
After you learn about the lives of the pilots, especially their hard training, you can decide ______ you want to become a pilot or not.