The mall will _____ for 12 hours on Sunday.[ ]A. openB. opensC. be open D. opening-九年级英语

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• 下列哪一项完整的列出了生态系统的组成成分（）A．阳光、土壤、空气B．阳光、土壤、空气和植物、动物C．植物、动物、微生物D．阳光、土壤、空气和植物、动物、微生物-生物
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• 在如图所示的密封容器内，绿色植物在富含腐殖质的潮湿土壤中生长，土壤中还有一些小昆虫，在适宜的条件下，瓶内生物能存活较长时间，这就是人们常说的生态瓶．下列有关该生态-生物
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