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No.13 Jiang Yiyan5.2. 5 Flatness Design Requirements? 9. Os.path.exists ()--Verifies that the specified object exists. True, otherwise False. Example:Article 19 [Agencies] Medical security agencies shall abide by the following provisions:Smoke bombs before burning:由《太空堡垒卡拉狄加》制作人打造的衍生剧《Caprica》的播出时间为2010年。主要讲述人类创造塞隆的过程，以及舰长阿达玛小时候的事情。Foreign students generally cannot take the college entrance examination in Tianjin. First of all, you must have a Tianjin registered permanent residence, and you must handle it well in advance. Children cannot transfer to another school until they go to high school or Grade 3. If you don't have a Tianjin hukou, either it is the kind of social students who have a very narrow choice of major in the college entrance examination, or you will be sent back to your place of origin for the examination. Please consult me for details.