44. Improvement in farm output per worker in Africa falls far short

　　43 Everyone in the world will have to bear the consequences of climate change, especially Africans 　　答案&解

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　　42 It has proved even more important to shift from traditional farming to setting up businesses that can br

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　　41 The use of fertiliser and improved seeds can help Africa& 39;s small farmers impressively increase crop yi

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　　40 Africa is especially susceptible to the effects of global warming partly because it has difficulty feeding

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　　39 Improved farming practices have enabled Kenyan farmers to increase farm produce remarkably 　　答案&解析　　39

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