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Computers are the second most useful ____ of the world. A.inventions B.inventors C.invention D.inventor
题目详情
Computers are the second most useful ____ of the world.
A.inventions B.inventors C.invention D.inventor
A.inventions B.inventors C.invention D.inventor
▼优质解答
答案和解析
答案是C.因为它只是一个发明,因此用单数.
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