在一个草原生态系统中，生产者是（）A．鼠B．草C．兔D．鹰-生物

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• 池塘生态系统中有鱼类、浮游动物、绿色水生植物、真菌等生物，则该生态系统中的物质和能量的流动是从哪类生物开始的（）A．绿色水生植物B．浮游动物C．鱼类D．真菌-生物
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• 如图是草原生态系统中的主要成员及食物关系，请据图回答下列问题：（1）图中所示的是生态系统的______部分．在生态系统中，植物是______，动物是______，细菌和真菌是______．（2）-生物
• —Mr. Wang __________ be in the office. The light is still on.—No, he __________ be. Because he phone
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• We hope that as many people as possible ______ join us for the charity show tomorrow.A．needB．canC．mu
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• （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
• 如图是草原生态系统的食物网示意图，据图回答：（1）从生态系统的成分来看，兔属于______（填“生产者”、“消费者”或“分解者”）．（2）“草→鼠→鹰”这条食物链中包括了3个环节；补充食物-生物
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• —Do you like listening to Moonlight Sonata (月光曲)? —Yes. It ______ really beautiful. [ ]A. feels B. l
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