The number of redundant constraints in the system is （）[img=302x298]1803a03a986d743.png[/img]
A: 1
B: 2
C: 3
D: 4
A: 1
B: 2
C: 3
D: 4
举一反三
- Among the following conclusions, the correct one is ____________.[img=415x210]1802e8730f6b36b.jpg[/img] A: The system is unstable. B: Link 2 is a redundant restraint. C: O is an instantaneous joint. D: O is not an instantaneous joint. E: The system is stable with no redundant restraints. F: The system is stable with 1 redundant restraints. G: The system is instantaneously unstable.
- which is the transfer function model for the system in the diagram?[img=577x523]17de64be134fb10.jpg[/img] A: 1 B: 2 C: 3 D: 4
- In the following mechanism, it has redundant constraints.[img=185x179]1803a1af94d1dec.png[/img] A: 0 B: 1 C: 2 D: 3
- 下列碳正离子稳定性顺序应是( )。(1)[img=55x29]17e0abbe7d0cf4b.png[/img] (2)[img=124x28]17e0abbe86207a6.png[/img] (3)[img=51x28]17e0abbe8f27381.png[/img] (4)[img=61x28]17e0abbe989993f.png[/img] A: (3)>;(4)>;(1)>;(2) B: (4)>;(3)>;(1)>;(2) C: (3)>;(4)>;(2)>;(1) D: (1)>;(4)>;(3)>;(2)
- Viewing: Number these events from 1-4 in the order they happened.[img=477x327]1803de18453944c.png[/img] A: 1 B: 2 C: 3 D: 4