【简答题】to spin quickly in circles ( )
【判断题】链传动中,传动比过大,则链在小链轮上的包角过小,包角过小的缺点是链条易被拉断。( )
【单选题】传动中,传动比过大,则链在小链轮上的包角会过小。包角过小的缺点是( )。
A.
同时啮合的齿数少,链条和轮齿的磨损快,容易出现跳齿
【多选题】UTC对三维立体肌腱的连续信号分出不同的超声类型有哪些
【单选题】链传动中,传动比过大,则链在小链轮上的包角过小,包角过小的缺点是()。
A.
同时啮合的齿数少,链条轮齿的磨损快,容易出现跳啮
【单选题】Which of the following is not the reason why Lyderic Bocquet suppose that spin is important?
A.
Because it keeps the stone fairly flat from one bounce to the next.
B.
Because the spin can create a gyroscopic effect.
C.
Because the gyroscope can prevent the stone from tipping and falling sideways into the water.
D.
Because the spin can reduce the water drag.
【单选题】链传动中,传动比过大,则链在小链轮上的包角会过小。包角过小的缺点是( )。
A.
同时啮合的齿数少,链条和轮齿的磨损快,容易出现跳齿
【单选题】To answer correctly is more important than _________. A. a quick answer B. to finish quickly C. finishing quickly D. you finish quickly