42. One possible solution to the food security problem is diversification of die

　　41 Although farms in the US can move a bit northward, crop yields may decrease 　　答案&解析　　41 答案解析F。

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　　40 People wonder if certain crops and foodstuffs could disappear like some animal species due to climate cha

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　　39 It is predicted that climate change will affect the availability and price of quality chocolate 　　答案&解

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　　38 A recent news report talked about scientific efforts to help crops survive droughts through genetic engine

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　　37 People around the world are eating foods more similar than what they used to eat 　　答案&解析　　37 答案解

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