题目内容：
What does "fertile" in the second paragraph mean?
参考答案：
答案解析：
单选题：What does "fertile" in the second paragraph mean?
- 题目分类：公共英语四级
- 题目类型：单选题
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Conrad and his group of AI researchers have been making enor
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根据下列文章，回答题。What is the trend of credit-theft crime?
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防止地表和建筑物变形，建筑设计方面的措施有（ ）。
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