39.Which device is used to regulate the speed of a diesel engine?
(A)Turbocharger
(B)Oil mist device
(C)Auxiliary blower
(D)Governor

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統計： A(65), B(35), C(27), D(221), E(0) #595093

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A渦輪增壓機B油霧偵測器C輔助鼓風機D調...
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