問題詳情
15. A mechanical attack on the metal surface may be due to a disturbance in the flow of waterover the blade arising from damage, in which case it tends to be localized in the form of comets.The erosion may be caused by which of the following reason?
(A) General
(B) Galvanic
(C) Gravity
(D) Cavitation
參考答案
答案：D
難度：適中0.47651
統計：A(28),B(14),C(36),D(71),E(0)