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(1) Normal detection of contacts. The normal detection of contacts refers to the detection of contacts when the control coil is not energized. The normally open contacts are open with infinite resistance, and the normally closed contacts are closed with resistance close to 0. The normal detection of the normally open contacts of the time relay is shown in the following figure.Regarding Song Meiling's Memoirs of the Xi'an Incident, we learned from the book that the writing of the manuscript began in early 1937. When Song started writing this article, he intended to sell it to the highest bidder and set up a fund to educate the orphans of the guards killed in the Xi'an Incident. The highest bidder was Aban. On behalf of the North American Newspaper Federation, he bought the copyright of the book from Song Meiling for 12,000 US dollars and published it in North America. Song Meiling's original manuscript is in English. The Chinese version we read today is the translation of the English version purchased by Aban.　　而丈母娘游萍(白冰冰饰)见状，便趁此机会要求殷雄要负起照顾母女之责任，并且百般纠缠殷雄，殷雄如何躲避都终将逃不了母女俩的手掌心。First, strong will//and B methods; Method A and method B write specific business logic in subclasses in turn.3. Link Attacks