18. To guarantee the quality of our products, we have a very ________ control and testing system.
(A) rigorous
(B) depressing
(C) entertaining
(D) savage

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統計： A(51), B(3), C(12), D(25), E(0) #2314688

詳解 (共 1 筆)

#4343554
rigorous (adj.) 嚴格的 ...
(共 84 字，隱藏中）
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