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Lifein30yearswillbe 1 becausemanychangeswilltakeplace...
问题详情:Lifein30yearswillbe 1 becausemanychangeswilltakeplace,butwhatwillthechangesbe? Thepopulationisgrowingfast.Therewillbe 2 peopleintheworldandmostofthemwilllivelongerthanbefore...