【单选题】How did diaries such as John Campbell ' s influence the study?
A.
They demanded more specific classification of visits.
B.
They demanded that church attendance be included as visits.
C.
They demanded that visiting a friend be classified as intimate.
D.
They demanded that both men and women be present.
【单选题】在载荷性质相同时,导向平键联接的许用压力取得比普通平键联接的许用挤压应力小,这是为了_____。
【单选题】在载荷性质相同时,导向平键联接的许用压力应取得比普通平键联接的许用挤压应力小,这是为了__。
【单选题】Brian says that to improve team performance, firms should pay more a attention to
【单选题】在载荷性质相同时,导向平键的许用挤压应力应取得比普通平键小,这是为了()