38. of fire fighting, communication and evacuation shall be carried out at least once half a year, with each session not less than four hours.
(A) Drama
(B) Drill
(C) Study
(D) Plan
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統計: A(35), B(164), C(54), D(53), E(0) #2355276
統計: A(35), B(164), C(54), D(53), E(0) #2355276