落水者被迅速冻死是由于______因素决定的。①人体体表隔热保温能力差②水的导热速度很快A.①B.②C.①②
落水者被迅速冻死是由于______因素决定的。①人体体表隔热保温能力差②水的导热速度很快
A.①
B.②
C.①②
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The annual survey for endorsement of a Load Line Certificate must be held within ______.A.the three month period immediately following the certificate's anniversary dateB.the three month period immediately preceding the certificate's anniversary dateC.three months either way of the certificate's anniversary dateD.the three month period centered on the certificate's anniversary date
狭水道条款适用于________。A.一切船舶B.除帆船和船长小于20m的船舶C.除捕鱼船以外的船舶D.BC都对