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预防性维护是由米勒首先倡导的,其主要思想是维护人员不应被动地等待用户提出要求才做维护工作,而应该主动出击,提前对那些还有较长使用寿命,但不久就需要作出变化或调整的系统进行维护。
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请在第__39__处填上正确答案。 查看材料
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结构型传感器是依靠传感器()的变化实现信号变换的。
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Michael Jackson,____ as a good singer, will give a performance in our school next month.(1分)
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Passage FiveMark Twain is one of America' s much-be loved authors, creating imaginative and humorous classics for children and adults alike, such as The Adventures of Tom Sawyer, The Prince and The Pauper, and Adventures of Huckleberry Finn. Twain passed away in 1910, leaving behind a treasure of great literature. But now, 100 years after his death,he' 11 have a brand-new book on the shelves: a three-vol umeautobiography.Twain hasn' t been keeping busy in his tomb it was his wish that publishers wait until .100 years after his death to publish his memoirs ) which he spent the last decade of his life working on.The autobiography totals more than 5, 000 pages, and likely won' t be all sunshine and roses. It seems that Twain harbored some bitterness against former girlfriends and ex- friends. He also writes negatively about politicians of his day, such as Teddy Roosevelt.It' s likely that he requested such a long lead time for the memoirs because he didn' t want to hurt the feelings of anyone ment ioned in this work.Although small sections of the memoirs have been prev ious ly published the autobiography has never been available in full, and should provide great insights into the man behind the classic books.The first volume of the set will be available in November, and the trilogy is being published by the University of California, Berkeley."There are so many biographies of Twain, and many of them have used bits and pieces of the autobiography' ,editor Robert Hirst told The Independent. "But biographers pick and choose what bits to quote.By publishing Twain' s book in full we hope that people will be able to come to their own complete conclusions about what sort of a man he was.
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