子宫最狭窄的部分是()
A.组织学内口
B.解剖学内口
C.子宫颈管
D.子宫峡部
E.子宫外口
参考答案:D
The control of distress traffic is the responsibility of().
A.the owners
B.the charterers
C.the shipper
D.the vessel in distress or of the station that relays the distress message
班轮运输运费的计算标准有几种