{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":123,"pdf_page":139,"physical_index":139,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"d711e8f404fed3a55ee5a0ffd5a12693183bf5f0a01e9e19e16a68213f43caef"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"显而易见，当上面的开关或下面的开关闭合，灯泡都会发光，这里的关键词是“或”，因此这样的门被称为“或门”。电气工程师用如下符号表示或门。\n\n它和与门的符号稍微有点相似，但是输入端的一边是弧线，像英文单词“OR”中字母“O”一样（这样可以帮你分清它们）。\n\n或门的两个输入中，只要有一个加上电压，输出就是高电平。如果将低电平看做0，高电平看做1，那么或门也有四种可能的组合状态。\n\n像总结与门一样，我们可以将或门的输入和输出关系总结为一个表，如下所示。\n\n或门也可以有多个输入端（只要任一个输入端为1，其输出端就为1，只有所有的输入端都为0时，输出端才为0)。\n\n前面解释了为什么我们所用的继电器叫双掷继电器，这是因为其输出有两种不同的连接方式。通常在开关断开的时候，灯泡不会亮。\n\n11 门\n\n123","previous_page":122,"next_page":124}