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【判断题】
生态植物是指在环境保护、培肥地力和降解环境污染等方面,具有重要价值的植物。( )A.
正确
B.
错误
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【简答题】When Mr. Jones went to a restaurant one day, he left his coat near the door. There was nothing in the pockets of the coat when he left it, so he was very surprised when he took his coat after his meal...
【简答题】阅读理解。 When Mr. Jones went to a restaurant near the city center one day, he left his coat near the door. At that time there were many people having lunch in it .There was nothing in the pocket of the c...
【简答题】为什么单晶体具有各向异性，而多晶体没有各向异性？
【简答题】为什么单晶体具有各向异性，而多晶体材料通常不表现出各向异性?
【简答题】为何单晶体具有各向异性?为什么多晶体在一般情况下不显示出各向异性?
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