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逆夏桑

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var bmi=weight/(height*height); if (bmi < 18.5) { alert('过轻'); } else { if (bmi < 25) { alert('正常'); } else { if (bmi<28) { alert('过重'); } else { if (bmi<32) { alert('肥胖'); } else { alert('严重肥胖'); } } } }


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