Diesel engine crankshaft deflection readings are generally taken at four crank positionsGood engineering practice requires the deflection gage or indicator to be（） ["placed as near the crankpin axis as possible","removed each time the crankshaft is repositioned","left in place for all four readings","reset to zero for all four reading"]
Angular motion about the vertical axis of a vessel is called（）. ["yaw","surge","sway","roll"]
旋转闪蒸干燥器排风机的工作原理是什么？
维果斯基的理论对教学的影响可以归纳为（）。 ["学习者是自主积极的“学徒式学习者”","学生的学习是受背景影响的","为了确保教学的有效性，教学应向学生提供挑战性认知任务和支架","教学是一个相互作用的动力系统"]
帧中继业务有哪些优点？
回风，车内回风口通过设于车内顶板处回风格栅，回风道，空调机组下部的回风口进入空调机组，与（）混合。
