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利用电流正反馈能够得到近似的最大电流恒流过程。( )
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中国特色社会主义是实践、理论、制度的紧密结合。中国特色社会主义道路、理论体系、制度，三者各有作用又统一于中国特色社会主义伟大实践，这是党领导人民在建设社会主义长期实践中形成的最鲜明特色。其中，中国特色社会主义理论体系是中国特色社会主义的（）
A. He has been to New Mexico many times. B. He has just graduated from
Section BDirections:There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre. Passage OneQuestions 57 to 61 are based on the following passage. The significance of trust is that it allows the parties involved in the relationship to indicate how they feel, what they behave, and where they disagree without fear of contradiction or reprisal (报复). Trusting relationship encourage people to disclose their plans and perceptions without hurting themselves or others. Hurt, whether real or imagined, is one of the most harmful consequences of personal relationships with other human beings. In situations which you feel that the other person has the power and intent to hurt you, trust diminishes quickly. Thus a climate of distrust appears in your relations with others. Conversely, if I can say whatever comes to my mind without getting hurt, a climate of trust pervades the relationship. Trust is a perceptual phenomenon that evolves from our experiences with others. If trusting were so easy, we would not need to make such a point of its importance in human relationships. To say that a person should trust others is to diminish the difficulty of producing trust. In mutual relationships, both parties must behave toward one another in trusting ways. Even though it hurts in the pit of the stomach, you must trust the other person and encourage him or her to say those things that demand a trusting response. No one likes to get hurt and few like to hurt others, especially not those others who are close to us in person-to-person relationships. We avoid expressing our true feelings lest we become the target of a revenging attack from the other person. If I indicate that I do not appreciate having you smoke in my car, I may love you as a friend or I may become the subject of ridicule for allowing little things like that to bother me. If that happens, I will be less open and less trusting of you the next time.57. Trust makes it possible for people to_ .
速？为什么？如果给定电压不变，调整反馈电压的分压比，是否能够改变转速？为什么？如果测速发电机励磁发生变化，系统有没有克服这种扰动的能力？
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