单选题Electrical wiring on all “T-Boats” must be（）。Aconcealed to prevent mechanical damageBconcealed so the boat can be maintained more easilyCprotected from the weatherDin an accessible place behind the ceiling
单选题
Electrical wiring on all “T-Boats” must be（）。
A
concealed to prevent mechanical damage
B
concealed so the boat can be maintained more easily
C
protected from the weather
D
in an accessible place behind the ceiling
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