在生态系统中，_________是碳循环中的重要物质。-八年级生物

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• The dish looks good, but when I eat it, it ______ very terrible.[ ]A. tastesB. smellC. lookD. sounds
• 用be的适当形式填空。①IJenny.You _____Tony.②— What_____ yourname?— Myname _____Alice.③— What____thisinEnglish?
• —Don’t play with the knife, ______ you’ll cut your hand. —Sorry, I ______ .A．so; can’tB．and; won’tC．
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• ---Who is the tallest boy? ---It ______ be John. John is of medium height.A．mustB．needn’tC．mightD．ca
• I _______ find my English book. Where is it? [ ]A. canB. am C. can't -七年级英语
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• 在进行模拟保护色的探究实验中，“实验中的你”扮演的角色是（）A．猎物B．捕食者C．幸存者D．旁观者-生物
• 下面关于生态系统的说法中，错误的是（）A．生态系统包括生物部分和非生物部分B．生态系统中的有毒物质是沿着食物链不断积累的C．生物圈是一个统一的整体，是地球上最大的生态系统-生物
• It _____ that Yu Mei has changed a lot. [ ]A. seem B. seems C. look D seemed-八年级英语
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• ----- Can you ride a horse? --------No, I ________.A．needn’tB．may notC．can’tD．mustn’t-九年级英语
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• 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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• Thedish_____nice. [ ]A.sounds B.smells C.feels -八年级英语
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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
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