單項(xiàng)選擇題A single barometric pressure reading of 28.60 indicates().

A.rapidly improving weather
B.deteriorating weather
C.a severe low pressure system
D.fair weather and calm


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2.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

3.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

4.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

5.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