划定的基本农田保护区，由县级人民政府农业行政主管部门建立档案。( )
参考答案：错
The following information is available about a particular task in your project plan：early start(ES), 25 days；late start(LS), 30 days；early finish(EF), 50 days；late finish(LF), 55 days. Based on this information。you can deduce that（）
A. the project float is 5 days
B. the project may get delayed
C. the task is not on the critical path
D. the task is on the critical path
关节功能位角度不正确的是（）
A.膝关节屈膝45°
B.肘关节屈曲70°～90°
C.踝关节90°
D.髋关节外展10°～15°，前屈15°～20°
E.腕关节背屈30°，尺偏5°～10°
