6. In the factory, routine inspections are required to ensure that all equipment is functioning ______
(A) mistakenly
(B)legally
(C)officially
(D) properly

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統計： A(0), B(0), C(0), D(2), E(0) #2754320

詳解 (共 1 筆)

#5111201
※ 正解為（D）。In the fact...
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