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單項選擇題

Water can put out common fires, such as （）.

A.wood，paper
B.textile
C.A+B
D.oil

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單項選擇題

For the duties （）in one emergency, one person may do more than one job and one job may be done by more than one person.

A.assigning
B.assign
C.toassign
D.assigned

單項選擇題

Seven short blasts continued for one minute means （）.

A. fire alarm
B. boat alarm
C. man overboard
D. emergency alarm

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