研究目的我在电视上看见一座大桥被不太强的洪水冲跨了。科学家经过勘察研究,得出结论:是因为桥墩水下部分长期有裂缝,没有及时发现、维修,所以被洪水冲跨。但记者采访了一些当地维修大桥水下部分的专业人员,他们说“:并不是我们没有维修,只是有许多 The purpose of the study I saw on television that a bridge was struck by less powerful floods. After investigations and investigations, the scientists concluded that because of the long-term cracks in the underwater part of the pier, they were not discovered and repaired in time, and were flooded by the flood. However, the reporter interviewed some local professionals who repaired the underwater part of the bridge. They said, ”We don’t have maintenance, but there are many