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Why is feedback so useful for deliberate practice? In the article "Failure is not the Mother of Success, Success is the Mother of Success" by Teacher Wan Weigang, it is stressed that feedback is divided into two types: one is to accuse you of not being able to do it yourself, and this feedback will bring bad effects. 2 refers to the right thing, not that you can't do it, but that what you do can be better promoted through improvement. Effective feedback is that "good is failure" needs to meet three conditions. 1. Timely, if it is wrong, someone will point it out to you immediately. It is not right for people to be right for things. The cost of mistakes is small. This is more like the green light thinking in the learning mentality. To distinguish between "I" and "my view of behavior". I am very good myself, and my behavior and opinions can be changed.Each method will be called in turn. The first thing to handle is that this handles most of the events. This example is one of them.Now use code to describe this scene. First, define a Light class. It can be predicted that the light object light will be created from the Light class. The light object will have two attributes. State will be used to record the current state of the light and button will be used to represent the specific switch button.该剧讲述了在面对现实压力和人生抉择时，兄弟俩依旧坚守最初梦想和对爱情执着的追求的故事。Sometimes, arms or legs will suddenly move involuntarily.书生宁采臣收账不成，无处可归，遂夜宿鬼寺兰若寺，遇上侠士燕赤霞，二人成为邻居。一日偶遇艳女小倩，二人两情相悦，但小倩乃是被树妖姥姥控制的鬼魂，专门迷惑精壮男子代姥姥吸取阳气。小倩见宁采臣心地善良不忍加害，并与他感情逐渐加深。宁采臣欲救小倩脱离姥姥魔掌，但苦于姥姥功力深厚，小倩无法脱离其魔掌。二人遂向燕赤霞求救