当听骨链断裂时气导听力损失为60dB。
参考答案:对
The old man came ______ to the railway station, only ______ the train was slowly pulling out of the station.
A.and ran; found
B.running; finding
C.running; to find
D.to run; finding
“提运单号”栏应填:
A.6951-7429742
B.69517429742
C.6951/7429742
D.CZ302/69517429742