A.旋轉(zhuǎn)加速 B.旋轉(zhuǎn)失速 C.氣流振蕩 D.氣流沖擊
A.фh=Qm,hCp,h(Th1-Th2) B.фh=Q/τ C.фh=Q·A D.фh=△t/R
A.2000 B.1900 C.1400 D.1200