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- 575296
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- 2010-10-19
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- 1970-1-1
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1.【22s】 Premise: people in one region lack of V-A, the region decide to plant one potato, this potato contain beta, beta can convert into V-A Conclusion:since potato is the main food in this region, and lack of beta, so the sale of this kind of potato will increase. support: there is no other difference between the new potato and the local potato. 2.【20s】 Premise: countries get together to uniformly control the North Sea pollution, Conclusion:avoid excessively restrictive controls should.... have no idea...... 3.【30s】 |
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