-
50849
2012-02-18 10:08
174
4
1. 2. 50 40 15 3.5 g = ml × (%) ×0.8 52 500ml = 500 ×52%× 0.8 = 208g 3. 4. 5. 6. 7. 8. 9. 10.
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2012-02-24
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2012-02-22
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2012-02-21
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2012-02-19