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No direct relationship has been proven between high cholesterol levels and heart attacks.
【参考答案】
N
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Boys have a higher risk of developing heart disease than girls.
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1. 大学生失业已经成为严重的社会问题 2. 大学生失业的原因 3. 提出自己对这个现象的看法和认为可行的解决途径 My Viewpoint on Unemployment of College Graduates
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