某编组站调车发生冲突,造成直接经济损失450万元,属于铁路交通一般()事故。
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便秘腹痛,胁下偏痛,发热,手足不温,舌淡苔白腻,脉弦紧,治疗宜选用:()
A. 三物备急丸
B. 大承气汤
C. 温脾汤
D. 大黄附子汤
E. 理中汤
Operating a rotary pump at speeds in excess of design requirements could cause().
A. decreased clearances between rotating parts
B. decreased slippage to the suction side of the pump
C. air binding in the discharge ports
D. erosion and excessive wear