单项选择题
A.concealed B.buried C.existed D.built
Attention is called to the fact that in many cases char...
单项选择题Attention is called to the fact that in many cases charted depths may be decreased by up to （）.
A.one nautical mile B.two kilometers C.5 cables only D.one fathom
At last，the palm trees that fringe the natural harbor o...
单项选择题At last，the palm trees that fringe the natural harbor of Port Aloahoa come into view on the horizon lit by the setting sun.The meaning of this sentence is that （）.
A.a vessel arrives at a port in a evening B.a vessel leaves a port in a evening C.a vessel arrives at a port in a morning D.a vessel leaves a port in a morning
As these features are not all charted，special caution s...
单项选择题As these features are not all charted，special caution should be exercised （） vessels navigating in the vicinity.
A.by B.with C.on D.in
