The point that is halfway between the forward and after perpendicular and is a reference point for vessel construction is the ().
A. Half length
B. Mid-body
Center line
D. Amidships
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()是指地下水位以下被水所充填的岩土范围。
A. 饱水带
B. 含水层
C. 隔水层
D. 承压带
中心静脉压的正常值是
A. 5-12cmH2O
B. 5-12mmHg
C. 0-5mmHg
D. 0-5cm H2O
E. 0-12mmHg
All self-propelled vessels on an international voyage must be equipped with how many Emergency Position Indicating Radio beacons(EPIRB)().
A. One approved Category I EPIRB
B. Three approved Category I EPIRBs
C. One approved Class B EPIRB
D. Two approved Class B EPIRBs
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