A.惯性力
B.阻尼力
C.弹性力
D.弹性力+惯性力
[单选题]问A.30oB.45oC.60oD.70o
[单选题]A.22.4~68.3kgB.12.4~58.3kgC.33.4~68.3kgD.44.4~68.3kgE.10~23kSg
[单选题]A.近远中径的1/4B.近远中径的1/3C.近远中径的1/2D.颊舌径的1/3
[单选题]A.1B.CPC.脉冲信号,频率为时钟脉冲频率的1/2D.0
[单选题]A.-1.475,142.32B.-1.475,284.64C.1.475,-284.64D.1.475,-142.32
[单选题]A.-1.475,142.32B.-1.475,284.64C.1.475,-284.64D.1.475,-142.32