单项选择题
A “full service” Loran-C receiver will provide（）.
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
点击查看答案&解析
相关考题
-
单项选择题
A “figure eight” knot is used to（）.
A.be a stopper
B.shorten a line
C.join lines of equal size
D.keep a line from passing through a sheave -
单项选择题
A “fifteen-pound” CO2 extinguisher is so called because（）.
A.there are fifteen pounds of CO2 in the container
B.the container，when full，weighs fifteen pounds
C.the pressure at the discharge nozzle is l5 psi
D.the empty container weighs fifteen pounds -
单项选择题
A “check” line is（）.
A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge
