13.船用燃油的閃火點一般應至少高於攝氏幾度?
(A)40
(B)50
(C)60
(D)100
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統計: A(13), B(18), C(123), D(28), E(0) #738590
統計: A(13), B(18), C(123), D(28), E(0) #738590