______ of the machines on display were made in China.A、Second-fifthsB、Two-fifth

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问题 ______ of the machines on display were made in China.

选项 A、Second-fifths
B、Two-fifth
C、Two-fifths
D、Second-fifths

答案 C

解析分数的表达足以基数词代表分子，序数词代表分母，除了分子是“1”的情况外，序数词要用复数。

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