单项选择题
A.古医籍中所记载的方剂 B.从明代至今出现的方剂 C.从清代至今出现的方剂 D.有一定的独特疗效,且秘不外传的处方
A.目标性原则 B.系统性原则 C.适应性原则 D.协调性原则 E.封闭性原则
A.all survival craft are lowered to the water,launched,and operated for thirty minutes B.all davits used for launching liferafts are operated C.each emergency position indicating radio beacon is tested for thirty minutes D.the helicopter pad landing lights are operating in a quick-flashing mode
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