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The second is to ensure high-quality online live learning effect and experience, so the technical research and development requirements for online platforms will be higher and higher.Reference: Baidu Encyclopedia-DNFTime relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.田文洁与丈夫贺立群用了半生积蓄，购买了一栋新建公寓的楼房，对即将开始的新生活充满了美好的期待。　Filter target users. Through the recommended content, tell the user whether to "welcome" or "refuse". It's just like when you look at the front page of Eye Quick Hands and say that you don't like such content, Quick Hands say that I don't want you, and my target users like it.短剧《陛下在左，老板在右》是一部讲述幻想跟老板谈恋爱的女主福宝，意外得到一本愿望笔记，并靠着笔记实现扑倒老板的愿望。这时突然从天而降一位自称是愿望笔记主人的古代皇子，为了拿回笔记，也对福宝开展追女攻势，从此福宝在两个男神之间不断周旋和动摇的都市甜宠的故事。太子熊心颇有心计，这个场合下，这么一句话。