阿摩線上測驗
20. The Diesel engines have______at high speeds among these three types of propulsion system. They require the least weight of fuel for a given endurance.
(A)greater efficiency
(B)smaller efficiency
(C)greater fuel compusption
(D)greater heating loss
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統計： A(2), B(0), C(1), D(1), E(0) #3478198
統計： A(2), B(0), C(1), D(1), E(0) #3478198
