进度拖延是工程项目建设过程中经常发生的现象,引起进度拖延的原因不包括()。
A.工程变更
B.风险因素
C.管理过程中的失误
D.施工段的划分
参考答案:D
All the soldiers were placed exactly the local government wanted them for the control of the comeback of the flood.
A.while
B.when
C.where
D.though
调心滚子轴承23210的内径尺寸为()mm。
A.10
B.50
C.100
D.210