我有一个句子不明白,请教英语教师Many of the problems presented by the country’s geographical features found solutions in innovative engineering projects.presented 是及物动词?为什么后面还有by,时态?语态?主谓是哪些?
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![我有一个句子不明白,请教英语教师Many of the problems presented by the country’s geographical features found solutions in innovative engineering projects.presented 是及物动词?为什么后面还有by,时态?语态?主谓是哪些?](/uploads/image/z/11453010-42-0.jpg?t=%E6%88%91%E6%9C%89%E4%B8%80%E4%B8%AA%E5%8F%A5%E5%AD%90%E4%B8%8D%E6%98%8E%E7%99%BD%2C%E8%AF%B7%E6%95%99%E8%8B%B1%E8%AF%AD%E6%95%99%E5%B8%88Many+of+the+problems+presented+by+the+country%E2%80%99s+geographical+features+found+solutions+in+innovative+engineering+projects.presented+%E6%98%AF%E5%8F%8A%E7%89%A9%E5%8A%A8%E8%AF%8D%3F%E4%B8%BA%E4%BB%80%E4%B9%88%E5%90%8E%E9%9D%A2%E8%BF%98%E6%9C%89by%2C%E6%97%B6%E6%80%81%3F%E8%AF%AD%E6%80%81%3F%E4%B8%BB%E8%B0%93%E6%98%AF%E5%93%AA%E4%BA%9B%3F)
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