It is very important that each cylinder should be （） scavenged before the charged air is compressed.

In order to reverse the rotation of a two-stroke/cycle loop scavenged， direct reversing， propulsion diesel engine， the cam positions must be changed for the （）.

Predation can be best defined as: A: A plant taking in nutrients B: An animal eating scavenged decayed material C: An animal eating a plant D: An animal eating any other organism