If a motion repeats after equal intervals of time, it is called a ( ) motion.
举一反三
- A semi-open motion is also semi-closed motion.
- A __________ changes the up-and-down motion of the pistons into spinning motion.
- In terms of scope or range, debate motions fall into three categories: open motion, closed motion and semi-closed/semi-open motion.
- A perpetuity is defined as a sequence of A: equal cash flows occurring at equal intervals of time for a specific number of periods. B: equal cash flows occurring at equal intervals of time forever. C: unequal cash flows occurring at equal intervals of time forever. D: unequal cash flows occurring at equal intervals of time for a specific number of periods.
- 智慧职教: The ( ) converts the rotation motion of the steering wheel into the straight-line motion.