____ is NOT a selection command.

A. comm
B. diff
C. grep
D. sed


Answer: D

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A. A slow charge is easiest on the battery. B. During a slow charge, the charging rate is between 10 amps and 25 amps. C. A battery is fully charged at the end of a slow charge when its specific gravity does not climb higher during two checks with a hydrometer, done 1 hour apart. D. Following a recharge, if the difference between hydrometer readings taken from different cells is more than 0.050, the battery should be replaced.

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