食管异物停留的最常见部位是()
A.梨状窝
B.食管的第2狭窄处
C.食管入口
D.食管与主动脉弓的交叉处
E.食管穿过横膈部位
参考答案:C
—Is Kate coming to the party this evening?
—No, she _________ be at the party. She________ to the UK.
A.mustn't; has gone
B.mustn't; has been
C.can't; has gone
D.can't; has been
因货物超载、偏载、偏重引起铁路货车技术状态异常时,列检()通知车站值班员,由车站进行现车确认和处理。
A、工长
B、检车员
C、助理值班员
D、值班员