营养臀大肌的动脉是（）。

A.臀上动脉

B.臀下动脉

C.髂外动脉

D.闭孔动脉

Fire protection regulations for towing vessels require training in all of the following，EXCEPT（）.

A.putting on a fireman's outfit，if the vessel is so equipped

B.donning a self-contained breathing apparatus，if the vessel is so equipped

C.activating the general alarm and reporting inoperative alarm systems and fire-detection systems

D.refilling and servicing all expended fire extinguishing equipment