经动脉导管栓塞治疗上消化道出血最常见的并发症是（）
A.栓塞脏器组织缺血坏死
B.腹腔出血
C.胆血症
D.门静脉血栓形成
E.肺栓塞
参考答案：A
经营者的不正当竞争行为给被侵害的经营者造成损失的，如果被害人的损失难以计算的，赔偿额为( )。
A．侵权人在侵权期间全部所得B．按照曾经发生的相同或者相近的案例的赔偿额计算C．侵权人在侵权期间所获得的利润D．侵权人在侵权期间所获得的利润的二倍
You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）
A.Your speed must be reduced to bare steerage ways
B.A look-out is not required if the radar is on
C.The radar should always be kept on a short-range scale
D.Fog signals are only required when a vessel is detected by radar
