The trouble-free life of an engine indicates （）.
举一反三
- The quality of the fuel oil and lube oil （）， Im afraid. A: has much to do with the operation of the engine and its life B: have much to do with the operation of the engine and its life C: has much doing with the operation of the engine and its life D: have much doing with the operation of the engine and its life
- On CFM56-3 engine, the oil temperature indicates the temperature of oil supply and oil tank. ( )
- The idea that "university life equals to freedom" in the second paragraph indicates that _____.
- Trouble is unavoidable in life and we should face it bravely.
- A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.