单选题The correct method of switching off a marine radar is to turn power switch to（）position first，then to（）position.Aoff／standbyBstandby／offCstandby／closeDclose／standby
单选题
The correct method of switching off a marine radar is to turn power switch to（）position first，then to（）position.
A
off／standby
B
standby／off
C
standby／close
D
close／standby
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