---Dad, must we wait until the light becomes green?---Yes, I’m afraid we ______. That’s the traffic

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• 如图表示生态系统的组成，图中X、Y分别代表（）A．绿色开花植物、酵母菌B．绿色开花植物、蝗虫C．生产者、酵母菌D．消费者、草-八年级生物
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