从图生态系统中我们可以看出那些结论（）A．狐狸的数量决定兔子的数量B．兔子是该生态系统的决定环节C．能量由光能转变成化学能D．物质由生产者流向消费者-七年级生物

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• 如图表示某地草原生态系统的一部分．请据图回答问题．（1）该生态系统由生物部分和______部分组成．细菌和真菌是生态系统中的______．（2）生态系统中各种生物体内的能量最终来自于_-生物
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• ---Look!It _______ be Mr Zhang . ---No,it _______ be Mr Zhang. He has gone to Paris .A．must, can’tB．
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