服务目标的追踪分（）两种方式。
A、服务要求
B、目标管理
C、过程控制
D、结果检查
参考答案：C, D
高处作业对梯子有什么安全要求？
Bernard Shaw began his career as a dramatist in 1892, when his first play "（）"(1892) was put on by the independent theater society.
