A.3 times the depth of water B.6 times the depth of water C.10 times the depth of water D.15 times the depth of water
A.anticlockwise rotating B.anticlock rotating C.clockwise rotating D.clock rotating
A.Steady，light to moderate winds B.Frequent calms C.Clear skies D.Low humidity
A.short confused swells B.gradually increasing white clouds (mare's tails) C.pumping barometer D.continuous fine mist-like rain
A.bring the sails parallel to the wind B.reduce sail area exposed to the wind C.allow the sails to catch more wind D.remove all tension on the main and jib sheets
A.forecasts B.observations C.analyses D.reports
A.visibility B.winds C.sea D.fog
A.high pressures B.low pressures C.weak pressures D.strong pressures
A.broadcast B.broadcasted C.are broadcast D.are broadcasted
A.cirrus B.cirrocumulus C.altostratus D.cumulonimbus
