The _____ of airplane engines announced a coming air raid.
举一反三
- __ is a force provided by engines to push airplane forward through the air（） A: Lift B: gravity C: thrust D: drag
- By doing the "tank test", the engineers can find out() A: the amount of air in the plane B: the strength of the plane structure C: the pressure inside and outside the plane D: the power of the airplane engines
- 中国大学MOOC: __ is a force provided by engines to push airplane forward through the air.
- The fresh air coming in through the inner air ports， is compressed by（） to a higher pressure.
- With internal combustion engines, future cars will pollute the air to a much less extent.