The Curies are best known for their (discover) ______ of radium.

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问题 The Curies are best known for their (discover) ______ of radium.

选项

答案discovery

解析本题考查名词的用法。留空处之前是物主代词，其后是介词短语，这说明空格处需要名词，而括号里是动词，因此须将其转化成名词discovery。

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大学英语三级A级

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