問題詳情
21.The total degree of degradation within a nozzle is expressed by the nozzle efficiency, which isthe ratio of the energy actually converted to to that theoretically possible.
(A)potential energy
(B)thermal energy
(C)pressure energy
(D) kinetic energy
參考答案
答案：D
難度：適中0.459459
統計：A(0),B(2),C(12),D(17),E(0)