①退耕还草②沙漠化严重③垦荒屯围④沙尘暴突起⑤粮食匮乏 A. ⑤－①－③－②－④ B. ⑤－③－②－④－① C. ⑤
①退耕还草②沙漠化严重③垦荒屯围④沙尘暴突起⑤粮食匮乏
A. ⑤-①-③-②-④ B. ⑤-③-②-④-① C. ⑤-②-③-①-④ D. ①-③-④-②-⑤
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