<正>阅读下列短文,从每篇短文后所给各题的四个选项(A、B、C和D)中,选出最佳选项。A A farm planted levels or floors is called a vertical(垂直的)farm.A skyscraper type building can house a vertical farm.Since the garden is built upwards,rather than outwards,it requires much less space than a conventional farm.The world is quickly running out of room for conventional farming.Vertical farms could be a key to this situation.An 18-story vertical
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