属于建设工程项目的经济与管理风险的是()。
A.组织结构模式
B.工作流程组织
C.现场与公用防火设施的可用性及其数量
D.施工机械操作人员的能力和经验
参考答案:C
不易产生积屑瘤的切削速度是()和低速。
In the figure above, segments RS and TU represent two positions of the same ladder leaning against the side SV of a wall. The length of TV is how much greater thanthe length of RV ?()
(1)The 1ength of TU is 10 meters.
(2)The length of RV is 5 meters.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.