在建设工程项目施工中,行为人对自己的行为承担法律责任不以损害事实发生为前提的是( )。
A. 项目经理进行采购合同淡判
B. 建设单位支付工程款
C. 施工人员施工中高空坠物
D. 施工队驾驶员的驾驶行为
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液压泵按( )的高低可分为低压泵、中压泵和高压泵。
A. 工作压力
B. 额定压力
C. 流量
D. 额定流量
车削丝杠螺纹时,必须考虑螺纹升角对车削的影响,车刀进刀方向的后角应取()。
A. 2°~3°
B. 3°~5°
C. (3°~5°)+ψ
D. (3°~5°)-ψ
According to the passage, what is the best for both parents and children
A. They should adjust themselves to sharing the family expenses.
B. Children should leave their parents when they are grown up.
C. Adult children should visit their parents from time to time.
D. Parents should support their children when they are in trouble.
车淬硬钢时,在冲击条件下,车刀刃倾角可取( )。
A. -10°~-20°
B. 0°
C. 10°~20°
D. -10°~0°