虚数とオイラーの等式 - Download as a PDF or view online for free
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1) The document discusses Google App Engine's Java data store services including the low-level API which allows direct access to entities, keys, and queries. 2) It covers the DatastoreService which allows storing and retrieving entities and keys, managing transactions, and allocating ids. 3) The document also discusses how to perform queries on the data store using Query and PreparedQuery includin
HTML5 introduces new semantic elements like article, header, nav, and section that divide the content into meaningful regions. It also defines new multimedia elements such as video, audio, and canvas. New form input types and attributes are added for validation. The Canvas API allows dynamic drawing via scripting. The Drag and Drop API supports dragging and dropping elements. Other HTML5 APIs incl
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