单项选择题________ is a commander and responsible for the safe and efficient operation of a ship. A、The chief engineer B、The pilot C、The bosun D、The captain
单项选择题下列哪项属《素问·玉机真脏论》所言“五虚”症状 A、腹胀 B、皮寒 C、前后不通 D、闷瞀
