输血时，出现皮肤红斑、荨麻疹和瘙痒，这种输血反应是（）
A.发热反应
B.循环超负荷
C.变态反应
D.溶血皮应
E.细菌污染反应
参考答案：C
磔
In each inflatable liferaft，what equipment is provided to make quick，emergency，temporary repairs to large holes in the raft? （）
A.No equipment is provided
B.Glue and rubber patches
C.Several various-sized sealing clamps
D.Self-adhesive rubberized canvas patches
