The energy for pushing this piston up can be supplied from （）， so that the piston can keep moving up and down.
举一反三
- For diesel engine piston cooling， lubricating oil can be supplied to the pistons by a/an （）.
- The piston moves up and down， thus causing the rotational movement of the（）
- I can’ t keep __________the teacher who speaks so fast. A: up B: up with C: with D: on with
- Would you slow down a bit, please I can’t ______ you. A: keep up with B: put up with C: C. make up to D: D. hold on to
- The two-stroke cycle begins with the piston coming up from the bottom of its stroke， with scavenge ports in the sides of the cylinder being （）.