Many of the projects in Europe are not successful becauseA．they occupy too much space.B．th
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Many of the projects in Europe are not successful because
A．they occupy too much space.
B．their windmills are too small.
C．they involve too many computers.
D．they are of large scales.
请帮忙给出正确答案和分析，谢谢！
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正确答案：D
细节题。文中指出欧洲国家的许多风力发电项目在商业上并不成功，主要因为其设施极其庞大，由此引发了很多结构和技术问题。故应该选答案D，largescale是原文中massive的同义替换。