当食草动物摄取食物时，植物体内的能量就会全部流入动物体内。[]-八年级生物

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• Mr. Green ______ speak a little Chinese, but he can't speak any Japanese.[ ]A. can B. may C. mu
• 某湖泊生态系统中，湖水中的DDT相对浓度为0.5×10-6，现发现各生物体内均有不同浓度的DDT，检测结果如下：检测对象ABCDEDDT浓度/×10-60.0052.00.575.50.04（1）5种
• 下表是对5种生物体内农药含量的测定结果，这些生物与生物之间有着吃与被吃的关系，请你分析，下列哪一条食物链的联系是正确的生物种类ABCDE单位体积农药含量（毫克）0.0450.-七年级生物
• —You fly the kites very well.—Thank you. I________ kites when I was 7 years old.[ ]A. can flewB. cou
• It's raining hard outside, so they stay in the classroom.[ ]A. must B. can C. have to D. might-
• 用情态动词can， may， must的适当形式填空。1.—What _______ I do for you? —I want some apples.2.My father _______ride
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• —Can you come to Susan's party? —Sorry. I ________ look after my grandma.[ ]A. amB. have to C.
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• I _______ like some noodles.[ ]A. does B. hadC. would -九年级英语
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• 某湖泊中存在着4种不同的生物A、B、C、D。研究者对其体内的食物成分进行了分析，并将结果绘制成下表：请你回答。（1）根据上表提供的信息，以食物链的形式表示4种生物的取食关系-七年级生物
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• 图反映了生态系统各成分之间的相互关系，据图分析回答下列问题：（1）图中①的作用是制造__________，因此，①被称为生态系统中的__________。（2）图中消费者是标号[]和标号[]所示-七年
• —Could you play football with me this afternoon?.—I'm sorry. I babysit my sister.[ ]A. have toB
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• -_I finish my homework today, Mum?-No, you _ . You can do it on Saturday. [ ]A. Must; don't hav
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• Henry ________ be at home because he phoned me from the farm just now.[ ]A. mustn'tB. might not
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