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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.220. X.X.253IT is the abbreviation of Information Technology, which means "information technology" and includes modern computer, network, communication and other information technologies. The widespread application of IT is a sign of entering the information society.什么是天堂?天堂有多远? 孩子生命老公家人朋友 我们到底还有多少时间 人们的时间，总是那么短又那么长 那微笑吧！我们说好不哭 孙又翔(修杰楷 饰)与赵承舒(林予晞 饰)与母亲及女儿如曦一家四口幸福的生活，承舒在怀第二胎的同时得知自己罹患脑癌第四期的噩耗！ 看着为家庭努力付出的又翔，和还未长大的如曦，感受肚中的小生命，每天努力的长大。而她却必须在生命与孩子之间，做出选择……　　小莲见子游痛不欲生，心下不忍，竟毅然飞身进入牡丹体内，拉着子游逃了出来。熊心显然听得有心烦，先发言的尽是些说空话不办实事的官员，至于掌兵作战的将领，和一些要害臣子反而都达成了默契，静悄悄一片，谁也没有说话。