25.缸套冷卻水的流動方向為何?
(A)由上而下
(B)由下而上
(C)由中向上
(D)由中向上下兩方
答案:登入後查看
統計: A(6), B(30), C(0), D(0), E(0) #1198505
統計: A(6), B(30), C(0), D(0), E(0) #1198505