人工消耗定额是指完成（）所消耗的人工数量标准。
A．单位合格产品
B．单位产品
C．单位投资额度
D．一定产品数量
参考答案：A
函数f（x）是定义在R上的奇函数，f（-1）=-2，对任意的x＜0，有f'（x）＞2，则f（x）＞2x的解集为______．
Task A has the following details：Optimistic estimate=30, pessimistic estimate=40, most likely estimate=35. Task B has the following details：Optimistic estimate=32, pessimistic estimate=37, most likely estimate=34. Task C has the following details：Optimistic estimate=25, most likely estimate=35, pessimistic estimate=45. Which task has the highest standard deviation （）
A. Task A.
B. Task B.
C. Task C.
D. Task A & Task C.
