49. The transport of ________ requires strict adherence to international safety protocols to prevent accidental leaks or explosions.
(A) perishable goods
(B) office stationery
(C) hazardous materials
(D) biodegradable waste
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統計: A(1), B(0), C(2), D(0), E(0) #3930762
統計: A(1), B(0), C(2), D(0), E(0) #3930762