A.an air leak has developed in the tank B.the tank cooling system has malfunctioned C.the pilot cylinder discharge valve is leaking D.an excessive amount of insulation has been installed on the tank and piping
A.you can stop within your visibility range B.you can take proper and effective action to avoid collision C.you are traveling slower than surrounding vessels D.no wake comes from your vessel
A.azimuthal gnomonic projection B.Lambert conformal projection C.transverse Mercator projection D.polyconic projection
A.matching pulse rates of at least 20 stations B.an automatic on-and-off switch C.a horizontal matching of all delayed hyperbolic signals D.automatic signal acquisition and cycle matching
A.turning the victim's head to the side to keep his airway open B.positioning the victim so the head is lower than the body C.giving the victim water if he is thirsty，but no food D.elevating the head and shoulders slightly with a pillow
