问题
问答题 简答题
什么叫拱圈的最优中心角？
答案
参考答案：
满足坝体应力分布均匀、拱坝的体积较小、拱端稳定性好的拱圈中心角。
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什么叫拱圈的最优中心角？
参考答案：
满足坝体应力分布均匀、拱坝的体积较小、拱端稳定性好的拱圈中心角。
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| One day an old carpenter (木匠) told his boss that he was going to give up his job and enjoy his family life. When he heard the news, the boss felt very sad 1______ He asked if the carpenter could help him build one more house. The carpenter agreed. Later the carpenter didn't spend all his energy on his work. In order to shorten (缩短) the time for the project, he built the house in a rough (粗糙的) way. 2______ When the carpenter went to say goodbye to the boss, the boss passed the carpenter the keys to the house and said to him," This is your house, 3______" The carpenter was completely surprised and didn't know what to say. 4______ Now he would have to live in such a house that was built by himself. In our everyday life, there are lots of people like the carpenter. They aren't strict in their work and they spend too little time on it. Once they realize that, 5______ In fact, we never stop building our "houses" every day. Let's spend all our energy in building them. Then our life will become better and better.
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