引起肘关节后脱位的常见病因是
A.用手猛提重物
B.肘后受暴力打击
C.肘关节伸直上肢外层位向后跌倒,手掌着地
D.上肢外展、外旋、后伸肘部着地
E.上肢外展位突然上举
参考答案:C
The dinosaurs _____about 65 million years ago. [ ]
A. were disappeared
B. disappeared
C. disappear
D. was disappeared
(多选)下列说法中正确的是( )
A.用久了的电灯灯丝变细是升华现象
B.被水蒸气烫伤比沸水烫伤更严重是因为水蒸气液化时要放出热量
C.秋天的早晨,大雾逐渐散去是液化现象
D.人出汗后,微风吹过感到凉爽,是因为汗液蒸发加快,带走更多的热量