【单选题】3个彼此作平面平行运动的构件间共有( )个速度瞬心。
【单选题】Paragraph 5_______
A.
Importance of learning from failure
B.
Quality shared by most innovators
D.
Edison's comment on failure
E.
Contributions made by innovators
F.
Misedes endured by innovators
【简答题】3 个彼此作平面平行运动的构件间共有 个速度瞬心,这几个瞬心必定位于 上。含有 6 个构件的平面机构,其速度瞬心共有 个。
【简答题】3 个彼此作平面平行运动的构件间共有 个速度瞬心,这几个瞬心必位于 。
【判断题】3个彼此作平面平行运动的构件间共有3个速度瞬心。
【简答题】The passage is about______. [A] the importance of education [B] the importance of play [C] the children's speech development [D] the relationship between play and study
【简答题】3个彼此作平面平行运动的构件间共有3个速度瞬心,这几个瞬心必定位于()上。
【单选题】paragraph5_________
A.
importance of Learning from Failure
B.
Quartlity Shared by Most Innovators
D.
Edison's Comment on Failure
E.
Contributions Made by Innovators
F.
Miserries Endured by Innovators