33.When the exhaust ports or valves are opened, the begin to exhaust.
(A)carbon and water
(B)refrigeration steam
(C)burnt gases
(D)oil sludge

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統計： A(18), B(19), C(46), D(17), E(0) #1204884

詳解 (共 1 筆)

#1410056
burnt gases 燃燒廢氣
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