【单选题】Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.
A.
The direction of pressure on the journal in four-stroke engine is continuously
B.
positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine
C.
four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines
D.
Low-stroke engines usually consume less lube oil than four-stroke engines
【判断题】所谓推销性,是指竞选者通过演讲展示自我,推销自我,是说服他人投自己一票,使自己在竞选中胜出。
【判断题】快速冻结生成的冻结晶较小,相对所产生的单位面积压力不大,且由于肌肉具有一定的弹性,尚不致引起肌肉组织破坏。
【判断题】在个体品德的生成和生长过程中,自我教育的活动是比不可少的,所谓的自我教育活动就意味着封闭性,即它是纯粹的“内在活动”,并不伴有开放性。()
【单选题】《建设工程质量管理条例》规定,施工单位必须建立、健全( )制度,严格工序管理,做好隐蔽工程的质量检查和记录。
【单选题】使用水银柱式血压计测量血压的过程中从听诊器中听到第一声搏动时,袖带内压力