正压式空气呼吸器工作时整机内部压力高于大气压。()
参考答案:对
The school _________ I studied for only two years was three kilometers away. [ ]
A. where
B. of which
C. in that
D. 不填
腰椎结核时塞性脓肿流注的部位,下列哪项是错误的()
A.腰大肌
B.股三角或股骨小转子附近
C.髂窝
D.腰三角
E.季肋部