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工程技术档案：永久指工程档案需要永久保存；长期是指工程档案保存期限等于工程使用寿命；短期是指工程档案保存（）年。
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工程文件中文字材料幅面尺寸规格宜为( )。
There are many causes for global warming in the world today. The ______(1.A. absorb; B.allow; C.continues; D. leading; E.ongoing; F.quantities; G.solutions; H.thinned)cause of global warming is the ______ (2.A.absorb; B.allow; C.continues; D.leading; E.ongoing; F.quantities; G.solutions; H. thinned)burning of fossil fuels, which releases carbondioxide into the atmosphere. Carbon dioxide, along with the other greenhouse gases of methane, nitrous oxide, and chlorofluorocarbons, is the cause of the greenhouse effect. This effect is dangerously increasing as the gases are being released in greater ______ (3.A.absorb; B.allow; C.continues; D.leading; E.ongoing; F.quantities; G.solutions; H.thinned). These gases not only build up to keep heat in the atmosphere, but they also thin the ozone layer. Some areas have been so ______ (4.A.absorb; B.allow; C.continues;D.leading; E.ongoing; F.quantities; G.solutions; H.thinned)by the gases that there are holes present in the ozone. These dangerous holes ______ (5.A.absorb; B.allow; C.continues; D.leading; E.ongoing; F.quantities; G.solutions; H.thinned)harmful rays from the sun to reach the earth. Those rays are the main cause of skin cancer. As the earth ______ (6.A.absorb; B.allow; C.continues; D.leading; E.ongoing; F.quantities; G.solutions; H.thinned)to increase its pollution level each year, the number of skin cancer patients increases.
三个代表”重要思想的核心观点是（）（）（）
“三个代表”重要思想的主要内容有（）（）（）（）（）
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