單項選擇題In battery charging rooms,ventilation should be provided().

A.at the lowest point
B.near the batteries
C.at the highest point
D.only when charging is in progress


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1.單項選擇題If passengers are on board when an abandon ship drill is carried out,they should().

A.take part
B.watch
C.go to their quarters
D.stay out of the way and do what they want