46 Why do the staff in the office buildings have more available time in starting their evacuation?
(A)Because they are younger
(B)Because they know where they are
(C)Because they have frequent fire drills
(D)Because the detection and alarm systems activate normally
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【題組】46 Why do the st...
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1.由於辦公大樓的居住者應該熟悉他們的環...