在一个成分复杂的生态系统中，对保持生态平衡起决定作用的是（）A．非生物的物质和能量B．生产者C．消费者D．分解者-生物

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• Put a bit of sugar in the coffee, and it will ______ better. [ ]A. sound B. taste C. look D. make -九
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• —This T-shirt _____ Jim’s. I saw him playing basketball here just now.—No, it _____Jim’s. Look, at t
• He____know the answer, but I’m not sure.A:maybe B:may be C:may D:must-八年级英语
• （1）草A、消费者：（2）昆虫B、分解者：（3）细菌、真菌C、生产者：（4）田里的水稻和杂草D、生长（5）老虎吃野猪E、竞争关系（6）植物开花结果F、捕食关系（7）小虎长成大老虎G、繁殖．-生物
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