問題詳情

33 Schools, office buildings, factories, and other commercial buildings have benefited from fireprotection ______ systems for over a century.
(A)split
(B)crucial
(C)sprinkler
(D)political

參考答案

答案:C
難度:困難0.32
統計:A(19),B(39),C(48),D(44),E(0)

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