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W: Hi, David. I haven’t seen you for ages. How are you getting along with your workM: Hi, Susan. Not so well as to be expected. I’ve left my position. I can’t bear the rudeness of my boss any longer.W: What are you going to do thenM: No idea. Anyway, I’ve got to think about it seriously. And youW: I’ve been very successful as a dancer. I like this kind of life. It is so exciting.M: You can’t do that forever.W: No. But I’ve decided to open a dance school once I’ve moved to the top. A lot of young dancers need better training.M: That’s a wonderful idea. How is the woman getting on with her work().
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在面向对象模型中常用的有两种继承，即单继承与 【18】 。
Now about the news. An early morning fire damaged the historic Gallad House today. It destroyed the third floor of the building but fire fighters saved the first and second floors. There were only a few elderly people living in the building at the time and they were carried out to safety. The Galled House was built in 1718 and was used as a hotel for over 150 years. George Washington stayed here in 1782. The Galled family owned the building until the 1930s. Then they sold it to the Muss family. Five years ago it was made into a building for the elderly. Several fire departments were called to the scene. When we asked Fire Chief Andrew Bond how the fire started, he answered that it was most likely a burning cigarette caused it. Chief Bond promised to further examine into the cause. Where did the fire probably start().
The mystery (悬案) around the disappearance of the famous crime writer Agatha Christie in 1926 was almost as (36) as any of her exciting stories. At about 11 o’ clock on the evening of Friday, December 3rd, Mrs. Christie got into her car and took a drive without saying (37) she was going. She didn’t return.The next morning her car was found without (38) at Newlands Corner, Surrey. it was (39) put on record that the Surrey Police did not find (40) until 11: 00 that morning. People (41) that she might have killed herself. (42) as the days went by, it was suggested that she was (43) . The press and the public naturally took great interest in the (44) , with at least one newspaper offering a reward (悬赏) to anyone who could find the (45) writer.Of course the police did their best to (46) her. But, sadly, after a week’s (47) they had made no progress. In the end they decided that Agatha must (48) the area.Agatha finally made (49) on Tuesday, December 14th, when she was reunited with (50) at a hotel in Harrogate, North Yorkshire. It was said she had been staying at the hotel for the past 10 (51) under the name of "Mrs. Theresa Neele". Her husband said, "She has suffered from the most complete loss of (52) and I do not think she knows who she is."Agatha Christie hated (53) . She seldom met reporters and made no (54) this time. The only (55) she made was that she had lost her memory, although with the help of a doctor she did manage to remember some of what she had done during her disappearance. 51（）
稀疏矩阵有两种存储方式，分别是三元组法、 【4】 。
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