The most important factor that causes the wear of the engine parts is （）.

[单选题]The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.A . indicated horsepowerB . brake horsepowerC . net horsepowerD . friction horsepower

[单选题]One of the most common causes of reduction gear failure is gear wear caused by scoring as a result ofA．surface fatigue of the gearsB．an inadequate lube oil filmC．plastic flow of the gearsD．fretting corrosion from water

[单选题]One of the most important questions they had to consider was _____ of public health.A． what B. thisC． that D. which

[单选题]One of the most important questions they had to consider was _________ of public health.A．whatB．thisC．thatD．which

[单选题]One of the most important questions they had to consider was( ) of public healthA． what B. this C. that D. which

[单选题]One of the most important battles of the American Civil War took _________at Gettysburg, Pennsylvania, in 1863.A． positionB． partC． placeD． chance

[单选题]（）are most important for modern logistics. Bar Code, POS, EDI and GPS systems dramatically improve the efficiency and accuracy of logistics activities.A . SupplychainsystemB . InformationtechnologiesC . LogisticstechnologiesD . Containerizationtechni

[单选题]What is the most important in the logistics information system? （）A . EDIB . POSC . GPSD . Bar Code

[单选题]The most important thing to handle pain is ______.A．) how we look at painB．) to feel pain as much as possibleC．) to show an interest in painD．) to accept the pain reluctantly

[单选题]The most important core component of computer system is _(71) ．(71)A．CD-ROMB．DRAMC．CPUD．CRT