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In the process of DNS resolution, the client initiates a query request, and the DNS server may need to make additional queries to complete the resolution process and give a response, which will consume certain computing and network resources. If an attacker uses a large number of controlled hosts to continuously send resolution requests for different domain names, the cache of the DNS server will be continuously refreshed, and the failure of a large number of resolution requests to hit the cache will cause the DNS server to consume additional resources for iterative queries, which will greatly increase the resource consumption of the DNS server.Polylactic acid (PLA) is a new bio-based and renewable biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, then glucose and certain strains are fermented to produce high purity lactic acid, and polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has good biodegradability, can be completely degraded by microorganisms in nature under specific conditions after use, and finally generates carbon dioxide and water without polluting the environment, which is very beneficial to environmental protection and is recognized as an environment-friendly material. This thing is actually a long piece, and then "curled up" in it and wrapped in a cylinder shape. What's the use? You will see it in a short time.(未完待续……) show_style();。ABC宣布续订《戈德堡一家》两季。电视剧改编自编剧亚当·F·戈德堡的真实人生经历。故事发生在二十世纪八十年代美国的一个平凡的家庭之中。贝弗利（温迪·麦克伦敦-考薇 Wendi McLendon-Covey 饰）和穆瑞（杰夫·格尔林 Jeff Garlin 饰）是一对结婚多年的夫妻，尽管生活中少不了磕磕绊绊，穆瑞的暴脾气更是为平静的生活增添了一丝波澜，但他和妻子之间的感情一直以来都十分要好。　　東京ドラマアウォード２０２１で奨励賞をいただきました！　　咸鱼要上天，暑期能上映！延续《风犬少年的天空》创作班底，将于暑期上映。但他一手扣着季木霖的手腕，另一只手仍旧不死心死地继续揽着季木霖的脖子。