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ngan200075
2 năm trước
Cho đường tròn O đường kính BC. Qua B vẽ tiếp tuyến xy của đường tròn O. Từ một điểm A trên cung BC (A khác BC), kẻ AD vuông góc xy tại D. Chứng minh AD.AC=AB.DB
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This is a story that Charlie Chaplin liked to tell about himself. It happened after the great actor had become internationally famous. A theater announced that a competition would be held to see who could act like Charlie Chaplin. Those taking part in it had to dress like Chaplin, walk like Chaplin and act one of the roles in a Charlie’s film. When Charlie Chaplin heard about the competition, he decided to take part in the competition himself. Naturally he kept his plan a secret from everybody. When the results of the comptition were announced, Charlie said: “ I didn’t know whether to feel angry or only surprised. I didn’t win the first prize. But after thinking about it, I decided that it would be best to laugh”. 11. This is a story which ____________ A. was told by his friends. B. happened even he was not famous yet. C. Charlie was fond of telling. D. was announced at the competition. 12. People who took part in the competition had to _______________ A. imitate Chaplin’s walking, dressing and acting. B. keep a secret from other people. C. sing a song. D. be a great actor. 13. Charlin didn’t ________________________ A. take part in the competition. B. allow this competition to be held. C. like a competition. D. tell anybody about his plan. 14. When the results of the comptition were announced _________ A. he was very surprised and angry. B.he learnt that he had won the first prize. C. he learnt that somebody else had won the first prize. D. he learnt that his new film was a success. 15. When he learnt the news he decided ________ A. to keep a secret B. to laugh C. to be angry D. not to take part in such a competition.

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