选择题：通常情况下影响滚子链传动动载荷和冲击能量的主要参数有哪些？设计中为减小传动动载荷和冲击，这些参数分别

The plaintiff didn.t know which laws and regulations should be applied in this c

已知两啮合齿轮的模数2，齿数分别为16和24，则它们中心距为 A.20 B.30 C.40 D.80

James.s strong verbal and written communication skills have been well used in th

Handcup Marketing is suing South China Corporation of not paying for the transac

客观要件是指合同依法成立、生效后，合同当事人一方或者双方未按照法定或约定全面地履行应尽的义务，也即出现了客观地违约事实，即应承担违约的法律责任。（）选择一项：对