某设备工程双代号时标网络计划如图10所示,图中工作B的总时差和自由时差分别为 ()。
A. 1天和0天
B. 2天和1天
C. 3天和1天
D. 2天和2天
The brother or sister of a gifted older child may fail to fulfil their own potential.
A. YES
B. NO
C. NOT GIVEN
事故统计分析方法是以研究伤亡事故统计为基础的分析方法,伤亡事故统计有()。(1)描述统计法(2)细节统计法(3)分组统计法(4)推理统计法
A. (1)(2)
B. (2)(4)
C. (1)(4)
D. (3)(4)
The four men's performance on stage can be described as______.
A. spiritual and bloodless
B. random and willful
C. shabby and shameful
D. soulful and exhilarating