题目内容
车削成型面的加工方法常用的有成形法和仿形法俩种。
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用成形刀对成形面进行加工的方法为成形法。
成形刀第一类就是整体式成型刀、第二类叫做棱形成型刀和第三类叫做圆轮成形刀。
成形刀的特点它具有加工精度高，使用寿命长制造复杂等特点，适用于较小直径的成形面。
A statesman is a person who is experienced in the art of government. He has had a long and respected 1 at the national or international level. The world is full of political leaders, but to meet the requirements of a great statesman, one must possess some 2 qualities, such as confidence, courage, foresight, integrity (正直) and charisma (感召力).In terms of (就…而言) 3 , a statesman must know clearly what his country and his people can become. He knows where he wants to take them and what it will take to 4 the goal. What is required of him is the ability to recognize problems and come up with 5 that are good not only for the short-term, but for the long-term as well. The statesman 6 to the issues of the here and now, and in the meantime, keeps in mind the world for future generations. For this purpose, he needs to 7 his ability to get support for his initiatives to 8 various challenges facing the nation and the world. He often needs to judge a situation and make difficult and possibly unpopular decisions based on what would be best for the greatest number of people. While it is important for a statesman to listen to the needs of the common people, his success also depends on their 9 . So he has to 10 that he can win their hearts. Indeed, great statesmen have had many political speeches that contain messages still as powerful as ever.
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