29. As a safety measure, the detonator for a nuclear device may be made of two pieces of equipment, _____ is controlled by a different employee.
(A) each of them
(B) each
(C)both of them
(D)each of which

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統計： A(46), B(8), C(6), D(78), E(0) #607600

詳解 (共 2 筆)

#1020596
which 是關代 根據前句 the detonator for a nuclear device may be made of two pieces of equipment, 有主詞動詞S=the detonator for a nuclear device V=may be made後句也是一個完整句子有主詞動詞 , 因為有動詞is 兩個句子要有關代或連接詞ex. and來連接，所以只能選有which 的D each of which
detonatorn.引爆装置，雷管，起爆管As a safety measure, the detonator for a nuclear device may be made of two pieces of equipment, each of which is controlled by a different employee.作為一種安全措施，雷管的核裝置可以由兩件設備，其中的每一個由不同的僱員進行控制。
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#2669702
主要子句+，+數量詞+of+關係代名詞 ...
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