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Edison failed ______ times before he succeeded in producing the first electric l
Edison failed ______ times before he succeeded in producing the first electric l
游客
2025-03-12
43
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问题
Edison failed ______ times before he succeeded in producing the first electric lamp.
选项
A、thousand
B、thousands
C、a thousand of
D、thousands of
答案
D
解析
本题考查的是英语中的固定用法。thousands of times表示不特指的“成千上万次”。而a thousand times表示确切的“一千次”。根据句子意思,“爱迪生在成功发明第一个电灯泡之前经历了成千上万次的失败”,选项D)为正确答案。
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