問題詳情
2. The automobile company has installed cutting-edge sensors inside the engines to monitorengine performance and alter the valves’ timing to _____ efficient combustion.
(A) adjudicate
(B) denounce
(C) optimize
(D) undulate
參考答案
答案：C
難度：適中0.514286
統計：A(14),B(2),C(18),D(1),E(0)