阿摩線上測驗
2. The automobile company has installed cutting-edge sensors inside the engines to monitor
engine performance and alter the valves’ timing to _____ efficient combustion.
(A) adjudicate
(B) denounce
(C) optimize
(D) undulate
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統計： A(27), B(4), C(46), D(4), E(0) #1588210
統計： A(27), B(4), C(46), D(4), E(0) #1588210
