单选题An aneroid barometer on a boat should always be（）.Alocated in an air-conditioned areaBmounted in the passenger compartmentCprotected by a collision bulkheadDpermanently mounted
单选题
An aneroid barometer on a boat should always be（）.
A
located in an air-conditioned area
B
mounted in the passenger compartment
C
protected by a collision bulkhead
D
permanently mounted
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