問題詳情

29.In a boiler, a tube through which steam and water passes from an upper waterwall header to thesteam drum is technically termed
(A)riser.
(B)feed tube.
(C)floor tube.
(D)reheater.

參考答案

答案：A
難度：適中0.682927
統計：A(56),B(12),C(7),D(4),E(0)