将下列草原生态系统的成分与其对应项连接起来．非生物成分水、土壤等生产者腐生细菌消费者牧草、树木等分解者牛、羊等．-生物

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• —you at home last night? —No, I . [ ]A. Are, am not B. Was, weren't C. Were, wasn't -八年级英语
• —_______I finish the work today?—No, you needn't.[ ]A. MustB. MayC. Can D. Need-九年级英语
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