單項(xiàng)選擇題A signal indicating Greenwich mean time would be preceded with().

A.a code hoist to indicate Greenwich mean time to follow
B.the letter G
C.the letters GT
D.the letter Z


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1.單項(xiàng)選擇題A sign of thunderstorm development is a cumulus cloud().

A.darkening,growing in size and forming an anvil top
B.that shows extensive vertical development
C.creating cold downdrafts that are felt on the ground
D.All of the above

2.單項(xiàng)選擇題A shipmate suffers a heart attack and stops breathing. You must().

A.administer oxygen
B.immediately check his pulse and start CPR
C.make the victim comfortable in a bunk
D.immediately give a stimulant,by force if necessary

3.單項(xiàng)選擇題A ship having continuous closely spaced transverse strength members is().

A.longitudinally framed
B.transversely framed
C.cellular framed
D.web framed

4.單項(xiàng)選擇題A shepherd’s crook is used to().

A.lower spring buoys into the water
B.find an anchor after the buoy has been lost
C.transfer a pennant wire to the anchor handling boat
D.clean chain as it is hauled into the rig

5.單項(xiàng)選擇題A set of interior steps on a ship leading up to a deck from below is know as().

A.a companion way
B.'tween-decks
C.stairs
D.Any of the above are acceptable