35.Threshold Limit Values (TLVs)是由下列那一個單位所制定？
(A) American Industrial Hygiene Association； AIHA
(B) Occupational Safety and Health Administration； OSHA
(C) National Institute for Occupational Safety and Health； NIOSH
(D) Centers for Disease Control and Prevention； CDC
(E) American Conference of Governmental Industrial Hygienists； ACGIH

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統計： A(0), B(5), C(1), D(1), E(6) #2746978