阿摩線上測驗
27. Technology companies generally invest a large percentage of their ______ in research and development.
(A) revenues
(B) regulations
(C) registration
(D) revelation
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統計： A(71), B(12), C(8), D(9), E(0) #1719771
統計： A(71), B(12), C(8), D(9), E(0) #1719771
