The engine of the ship was out of order and the bad weather _____ the helplessness of the crew at sea. [ ]

A. added to

B. resulted from

C. turned out

D. made up

离心式鼓风机的进口叶片调节控制装置用钢板焊接制成，所有的叶片都制作成在叶片主轴周围旋转（），以便调整来自风扇的空气流动率。

A.30°

B.45°

C.60°

D.90°