单项选择题
A.can be absorbed through the skin B.causes irreversible damage to eye tissue C.is a very unstable product D.All of the above
A low pressure annular preventer which is used to direc...
单项选择题A low pressure annular preventer which is used to direct flow of kick fluids away from the rig floor is called a （）.
A.dump valve B.deflector C.separator D.diverter
A low HDOP (Horizontal Dilution of Precision) number su...
单项选择题A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a （）.
A.poor fix B.good fix C.poor signal quality D.good signal quality
A list signal of one white light indicates that the ves...
单项选择题A list signal of one white light indicates that the vessel is （）.
A.on an even keel B.listing about 1° to the side the light is displayed on C.listing over 5° With the light displayed on the high side D.listing，and the chutes should be directed to the side where the light is displayed
