阿摩線上測驗
40. A large fraction of the heat input to an internal-combustion engine is wasted in what？
(A) exhaust gas
(B) thermally insulating material
(C) condenser
(D) constructing material
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統計： A(786), B(121), C(149), D(50), E(0) #2014797
統計： A(786), B(121), C(149), D(50), E(0) #2014797
