某工程双代号网络计划如下图所示，图中已标出每个节点的最早时间和最迟时间。
双代号网络图应符合( )原则。
参考答案：A
《药品包装、标签规范细则》规定，在标签内容中有[功能与主治]的药品是()
A．化学药品
B．生物制品
C．中药制剂
D．预防性生物制剂
E．治疗性生物制剂
When evacuating a seaman by helicopter lift，which course should the ship take?（）
A.Downwind so that the apparent wind is close to nil
B.A course that will keep a free flow of air，clear of smoke，over the hoist area
C.A course that will have the hoist area in the lee of the superstructure
D.With the wind dead ahead because the helicopter is more maneuverable when going into the wind
