45 Fire ________ are able to determine the original location of a fire through clues such as char patterns and heat shadows.
(A) spectators
(B) investigators
(C) investors
(D) researchers

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統計： A(31), B(211), C(41), D(37), E(0) #2355283

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Fire investigators a...
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(A) spectator 觀眾(B) ...
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