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{{B}}第二篇{{/B}}What is NOT true about the scramjet engine A.It goes slower than a rocket.B.It extracts oxygen from the air that flows through the engine.C.It works only at speeds greater than five times the speed of sound.D.It doesn’t carry its own oxygen supply. 相关知...
Ramjet and scramjet engines are jet engine variants that ditch the rotary compressor and turbine from a regular jet engine. The two models rely on the natural ramming of air to produce thrust. The basic operating principle in ramjets and scramjets involves converting the significant kinetic energy...
What is NOT true about the scramjet engine?A.It goes slower than a rocket.B.It extracts oxygen from the air that flows through the engine.C.It works only at speeds greater than five times the speed of sound.D.It doesn’t carry its own 0xygen supply.