枕部外伤后来院行CT检查时突然呼吸节律不整,继之呼吸停止,双瞳等大()
A.小脑幕切迹疝
B.小脑扁桃体疝
C.视神经损伤
D.颅内低压
E.原发性脑干损伤
参考答案:B
_____ his own study with his classmates, Xiao Li found he had fallen far behind. [ ]
A. Comparing
B. Compared
C. Comparing with
D. Compared with
汽油吹管火焰由外向内共有4层火焰,其中温度最高的是
A.燃烧焰
B.氧化焰
C.混合焰
D.还原焰
E.氧化焰和燃烧焰