A semi-open motion is also semi-closed motion.

A __________ changes the up-and-down motion of the pistons into spinning motion.

If a motion repeats after equal intervals of time, it is called a ( ) motion.

智慧职教: The (     ) converts the rotation motion of the steering wheel into the straight-line motion.

In terms of scope or range, debate motions fall into three categories: open motion, closed motion and semi-closed/semi-open motion.

What does the lecturer advise debaters to do to better analyze the context of a motion? A: To research on the background of the motion. B: To ask relevant questions. C: To determine the motion type. D: To explain difficult terms.

The crankshaft is used to change the ____________ motion of the piston into __________ motion. A: reciprocating, rotary B: rotary, reciprocating C: vertical, horizontal D: horizontal, vertical

The converts the rotation motion of the steering wheel into the straight-line motion. A: Steering knuckle B: Steering gear C: tie rod D: drag link

中国大学MOOC: For the motion: Museums should return their collected artifacts to the home countries, when the oppositional team says:" if the motion is implemented, museums will be discouraged from collecting artifacts, then a lot of first-class artwork might get lost", the team is to present _______ that might be caused by the motion.

Acceleration relates to motion. It m________ a change in motion.