【正文】 t wait for old just miss. Time to return, seize every moment, again painstakingly again tired also Those struggling to fly. 23, life could not Yimapingchuan, even flat pavement, inevitably there will be a few pieces of roadblocks. Some of the rocks around the past, while others have to move it out. Just move others put the stone is very easy, because the stone from the appearance we can discern。t envy who. Like a person is a kind of feeling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in the peace of mind。 not unrewarding perfunctorily, but calm attitude of life of unrestrained selfconfidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrowminded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract trouble and worry, pletely depends on how we look at and deal with it. Don39。 圖 習題 電路圖 解 r a d / s2411110 ???? LC? A03 oSR ??? ?? II A09159012 0310j oSL ?????? ?????? ?? LIRI ? A0915031090412Cj oSC ????????????? ?? IRI ? 故 ? ?A 2sin23R ti ? A )90 (2s in215L ??? ti A )90 (2s in215C ??? ti 圖 諧振電路中， V) 1000sin(220S tu ? ,電流表讀數(shù)是 A20 ，電壓表讀數(shù)是 V200 ，求 CLR 、 的參數(shù)。 圖 習題 電路圖 解 0j1 9032j106 ?? ?????? ?????? UUU 整理得： ? ? ? ? 0j31j12261j12 ??????? ??????????? ??? ??? UUU 求得 V4523j33 ??????U 已知 ? ?A30 5sin2S1 ??? ti ， ? ?A ti ? ， 用疊加原理求圖 中的電流 i 。 圖 中， 已知 V)150sin(4 o1 ?? tu ， V)90sin(3 o2 ?? tu ， 求 Su 。 解 有效值為 210 ??U Hz502314 ?? ?f ； ??fT 將 0?t , V5?u 代入 ， 有 )sin(105 ??? ， 求得 初相 ??? 30? 。 圖 習題 電路圖 解 (a) 222221 ?????? III (b) A11221 ????? III (c) ???? UUU (d) V11221 ????? UUU 求圖 所示電路 ab 端的等效阻抗 Z 及導納 Y 。 （ a）電路 (b) 相量模型 圖 習題 電路圖 解 將時域模型轉化為相量模型如圖（ b） 用有效值相量計算， V904 oSS ???? ?Uu ， ? ? ????????? ???? 452j1jj2 j)j ) ((221Z A4522452 904 o1 ?????? ???????ZUI S A452jj2 j o1 ??????? ?? II ? ?A45 sin2 ??? ti )j( 1 ?????????? ??? IIU ? ? 08 s i ??? tu W8)45c o s (224)4590c o s ( oo1S ????????? IUP 日光燈可以等效為一個 RL 串聯(lián)電路，已知 W30 日光燈的額定電壓為 V220 。 圖 習題 電路圖 解 由于 22 )( LRUI ??? 當 rad /s314502 ??? ?? 時， A10?I ， V220?U 得 22 )314(22020 LR ?? 當 ra d /s12562020 ??? ?? 時， 5A?I ， V022?U 得 22 )125 6(0225 LR ?? 解得 ??? LR ，　 。 I am not afraid of the truth to tell the best friend, I39。t lose your life and the life, respectively is: the former is a we experienced cannot escape in a day finally will last minute, while the latter is our persistent, we want to cherish the memory of those people and things. 14, learn to smile, learn to strong, the world you know so many people, so many people and you are, you cannot change also can39。s two laws, doing practical play highway. 2020 October 18, the Central Committee of the Communist Party of China promulgated the implementation of the the probity of the Communist Party of China selfdiscipline criterion and Chinese Communist Party discipline and punishment regulations. We Heyuan male passersby to respond positively to the call of the Central Committee of the party, earnestly anize the study party two regulations, truly grasp the essence and gist, and in their respective positions, to hold the bottom line of the discipline, build a strong ideological line of defense, with the courage to play, the courage to fight tough and fearless spirit, at the crucial moment well to plete the task, with practical action to test the study and implement effect Because of discipline in the * * * * * * * * * * * story. Here, let me to cast a brick to attract jade, speak about our highway. Highway line section of the road surface transformation project, last year towards the country seized will be seized one of the items. To plete this arduous task, as a project management office director Comrade, keep in mind from the Communist Party membership, recognize and identify the bottom line, strict management, and strict adherence to the quality of the project. He not only set an example, honesty and selfdiscipline, but also requires the management of all the members of the ., do not eat the construction unit one meal, do not accept the construction unit a ceremony. In this way, they didn39。t helpless, because they are still alive, is still a dream, the sun still, we still. Lost, keep memories。 heart tired, calm. Grow up, mature, this society read. Tired and sad, squat down, to their a hug. Because the world no one can sympathize with you, have mercy on you. You cry, tears is your own。 圖 3. 29 習題 電路圖 解 三角形連接負載的相電流為 A60386010 03 8 0 o1ABAB ????? ??????ZUI 1A 表讀數(shù) 為線電流 lI ，由線電流與相電流關系可得： 6 5 .8 2 A3833 AB ???? II l 星形連接時， A相電壓為： V30220303 ooABA ???????? UU 負載的相電流為 302203j4 30220 o2AA ????? ????? ???????ZUI 2A 表讀數(shù)為相電流 pI ，即 44Ap ?I（英文版 ） easily blame, to prevent the broken window effect. Supervise the leading cadres to play an exemplary role, take the lead in the strict implementation of the code and rule , lead to safeguard the solemnity and authority of th