問題詳情
8. The ____ tank maintains the static head on the suction side of the water system. It also providesa convenient point for collecting vents and adding make-up feed water.
(A) gravity
(B) sump
(C) expansion
(D) collecting
參考答案
答案：C
難度：非常簡單1
統計：A(0),B(0),C(2),D(0),E(0)