問題詳情
6. The supplemented pressure acting on piston ring against the liner isprovided by ______ pressure over the inner circumference of the pistonrings to seal the cylinder when the piston reciprocates.
(A) gas
(B) scavenging air
(C) fuel
(D) lubricating oil
參考答案
答案：A
難度：適中0.646552
統計：A(75),B(24),C(5),D(12),E(0)