【单选题】We grease the bearings of all pumps at intervals.我们定期给所有泵的轴承加牛油 01010038
A.
We grease the bearings of some pumps periodically.
B.
We grease the bearings of several pumps periodically.
C.
We grease the bearings of only one pump periodically.
D.
The bearings of all pumps are greased periodically.
【单选题】在Windows操作系统中,双击应用窗口的标题栏可以完成( )操作
【单选题】The crankpin bearings are made of ( )
【单选题】The highest loads applied to the diesel engine crankshaft main bearings are ___________.
【判断题】力的可传性原理只适用于刚体,而不适用于变形体。
【单选题】在Windows 7操作系统中,不能用于退出应用程序的方法是______。
【判断题】讲授式网络教学模式不属于网络教学基本模式。
【判断题】Guide
bearings support rotating shafts or journals.