問題詳情
16. As a safety measure, the detonator for a nuclear device may be made of _____ each of which is controlled by a differentemployee.
(A) two equipments
(B) two equipment pieces
(C) two pieces of equipments
(D) two pieces of equipment
(A) two equipments
(B) two equipment pieces
(C) two pieces of equipments
(D) two pieces of equipment
參考答案
答案：D
難度：簡單0.706667
統計：A(6),B(2),C(9),D(53),E(0)
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