下列哪种体征是骨折的专有体征（）
A.肿胀与瘀斑
B.疼痛与压痛
C.功能障碍
D.反常活动
E.以上都不是
参考答案：D
What are the most important reasons for using water fog to fight fires?（）
A.Smothers burning surfaces，organically destroys fuel
B.Cools fire and adjacent surfaces，provides protective barrier
C.Reaches areas not protected by steam or CO2 smothering systems
D.Allows fire to be attacked from leeward，saturates liquid surfaces
治疗胎动不安的原则除安胎外，下述论述不准确的是（）
A.固肾
B.补气
C.养血
D.清热
E.祛痰
