The three bars O1A, O2B and AB are pin-connected in one plane. At the position shown, O1A//O2B. In which case bar AB undergoes translation when bars O1A and O2B rotate in the plane.
A.
B.
C.
D.
- · 有4位网友选择 C,占比20%
- · 有3位网友选择 A,占比15%
- · 有3位网友选择 D,占比15%
- · 有2位网友选择 C,占比10%
- · 有2位网友选择 B,占比10%
- · 有2位网友选择 B,占比10%
- · 有2位网友选择 D,占比10%
- · 有2位网友选择 A,占比10%