填空题

No direct relationship has been proven between high cholesterol levels and heart attacks.

【参考答案】

N
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1993 1998 2003 traveling outdoors 60% 72% 91% staying at home 40% 28% 9% total 100% 100% 100% 1.上表显示1993、1998、2003年人们的不同度假方式。请描述其变化 2.说明发生这些变化的原因 3.今后人们的度假方式还可能有怎样的变化
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A.refersB.appliesC.happensD.concerns
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