阿摩線上測驗
4. ________ are used widely in marine applications in combustion equipment such as main engines, auxiliary engines and boilers.
(A) Heavy fuel oils
(B) Coals
(C) Paraffins
(D) Gasoline oils
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統計： A(22), B(0), C(0), D(3), E(0) #3922448
統計： A(22), B(0), C(0), D(3), E(0) #3922448
