单项选择题
A.Cirrus B.Cumulus C.Stratus D.Nimbus
An “ABC” dry chemical fire extinguisher would be LEAST ...
单项选择题An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
A.a mattress B.spilled liquids such as oil or paint C.high voltage electrical gear D.a trash can
AMVER is a system which provides（）.A.satellite communic...
单项选择题AMVER is a system which provides（）.
A.satellite communications B.navigational information C.weather information D.position reporting service
All towing vessels of 26 feet or longer while navigatin...
单项选择题All towing vessels of 26 feet or longer while navigating are required to carry which item? （）
A.At least two lifeboats B.A radiotelephone C.A radio direction finder D.None of the above
