单项选择题
A.contains 15 pounds of CO2 B.weighs 15 pounds when full of CO2 C.has 15 pounds of pressure at the nozzle D.weighs 15 pounds when empty
Records of tests and inspections of a cargo vessel’s fi...
单项选择题Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be（）on board until the vessel’s Certificate of Inspection expires.
A.consealed B.detained C.contained D.kept
Accumulations of oily rags should be（）.A.kept in nonmet...
单项选择题Accumulations of oily rags should be（）.
A.kept in nonmetal containers B.discarded as soon as possible C.cleaned thoroughly for reuse D.kept in the paint locker
