题型:单项选择题 A1/A2型题 胆总管内正常压力为()A.0.49~0.98kPa(5~10cmH2O)B.0.98~1.47kPa(10~15cmH2O)C.1.47~1.96kPa(15~20cmH2O)D.2.45~2.94kPa(25~30cmH2O)E.2.94~3.43kPa(30~35cmH2O) 查看答案
题型:单项选择题 Every lifeboat which is fitted with a fixed two-way()radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.A.HFB.VHFC.MFD.MF/HF 查看答案