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一般息止牙合隙平均值为
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坡屋顶是指屋面坡度在（ ）的屋顶。
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Internet data shows that American younger adults have become the primary group mad about altering their personal appearance. Once the realm of the well-to-do female in her fifties, plastic surgery has become the attraction of the least rich【C1】______of younger Internet users. Search data【C2】______this phenomenon. One of the most popular sites visited from the search【C3】______"plastic surgery" is the【C4】______site of the American Society of Plastic Surgeons. Over 25% of visitors to the site fell【C5】______the 18- to 24-year-old demographic—that"s up from 19.6% two years【C6】______ . Looking at other health related sites visited by 18- to 24-year-olds,【C7】______just how mad this age group is about appearance.【C8】______their older counterparts who visit sites related to【C9】______and keeping healthy, younger Internet users【C10】______to sites that dwell on personal appearance, such as those【C11】______on bodybuilding, weight loss and skincare. And 【C12】______plastic surgery. But if we track the trend in searches on topics such as "breast implants" or "plastic surgery," there has been a steep【C13】______in all plastic surgery topics over the last year. What"s【C14】______this downturn It may very well be related to the failing U.S. economy and the【C15】______ income group of visitors to cosmetic surgery sites—U.S. households that【C16】______less than $30,000 per year. In fact, if we look at the search patterns around popular surgeries, over the last year the term "cost" is the most【C17】______appearing qualifier. We see more searches such as "breast implant cost" and "plastic surgery cost".【C18】______older demographics continue to search for information on procedures such as face-lifts, it"s the younger Internet users who in tough【C19】______times are focusing on improving their outer beauty, although at a(n) 【C20】______price. 【C9】
十八届三中全会指出，全面深化改革，必须高举中国特色社会主义伟大旗帜，进一步解放思想。解放思想是发展中国特色社会主义的一大法宝，其原因是______
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