德国法学家耶林格认为，“罗马曾三次征服世界，第一次是以武力，第二次是以宗教，第三次则以法律。”古代罗马之所以能以法律征服世界，主要是因为罗马法中蕴涵着如下观念（    ）

①褒义的：____  ____

②贬义的：____  ____

据报道，2014年5月17日上午，海南热带特色水果节在西安开幕．水果节现场，共展出了13类36个品种26吨的海南精品热带水果．西安已成为海南热带特色水果在西北地区的最大集散地．水果是否属于光源？游客们能看到各类水果是因为光的什么现象？

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    There is a tiger and a monkey. They are friends. But one day they want to know who is stronger. One of them says, “The one who can get apples over there is stronger. ”There is a river over there. The monkey says, “I can't swim. ”The tiger says, “I can swim. Please sit on my back. ”They go across(穿过) the river. The apple trees are very tall. The tiger can't reach(够着)the apples. The monkey climbs up the tree and gets many apples. Now they know they should help each other.