岗位职务描述应遵循的原则包括（）。
A.专家行为原则
B.个性化原则
C.科学操作原则
D.动态管理原则
E.有效性原则
参考答案：A, B, C, D
The rich man much food the poor families during the hard time.
A．provides; at
B．provides; with
C．provided; with
D．provided; for
