單項選擇題

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

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單項選擇題

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

單項選擇題

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

A “full service” Loran-C receiver will provide（）.

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A “figure eight” knot is used to（）.

A “fifteen-pound” CO2 extinguisher is so called because（）.

A “fifteen-pound” CO₂ extinguisher is so called because（）.