锟斤拷锟斤拷2009锟竭匡拷锟斤拷锟斤拷锟斤拷輪锟斤拷(f锟斤拷)锟斤拷(x锟斤拷)知锟絉锟絚锟斤拷透

锟斤拷锟斤拷锟紹(t锟斤拷i)锟饺決锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷(ji锟斤拷)锟角成旓拷锟斤拷锟絇(gu锟斤拷n)锟絀

锟斤拷锟斤拷锟斤拷一锟絭锟斤拷锟絯锟斤拷平锟解問锟絵锟侥凤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷一锟斤拷知锟絉锟絎(w锟斤拷ng)锟絡(lu锟斤拷)

锟斤拷锟斤拷锟斤拷K锟斤拷要“知锟絉锟斤拷锟斤拷”锟斤拷锟統锟斤拷锟絵锟斤拷锟酵嗭拷锟絵

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絚锟絝锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷1锟斤拷锟給摩锟斤拷锟斤拷锟絚锟斤拷锟斤拷摩锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絚锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷2锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷思路锟酵诧拷锟紼1锟斤拷锟斤拷锟侥达拷锟斤拷锟斤拷锟叫旓拷

锟斤拷锟斤拷2锟斤拷锟斤拷锟絞锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷3锟斤拷锟斤拷摩锟斤拷锟斤拷锟斤拷锟斤拷锟絖

锟斤拷锟斤拷锟斤拷锟斤拷1锟斤拷锟絧锟終锟斤拷锟絧锟経锟斤拷锟絧

锟斤拷锟斤拷锟斤拷锟缴碉拷锟斤拷锟絖锟斤拷锟斤拷

锟斤拷锟斤拷2锟斤拷锟斤拷锟絯锟斤拷锟酵革拷锟斤拷锟斤拷

锟斤拷锟斤拷锟絗锟斤拷锟絰锟斤拷

锟斤拷锟斤拷锟斤拷锟絯平锟斤拷1锟斤拷平锟斤拷l锟斤拷锟斤拷

锟斤拷锟�锟斤拷锟�

锟斤拷锟斤拷锟节橈拷(g锟斤拷u)锟缴凤拷锟絔锟斤拷邊锟斤拷

锟斤拷锟斤拷2锟斤拷锟斤拷锟侥合成和分斤拷一平锟斤拷锟斤拷邊锟轿凤拷锟絫

锟斤拷锟斤拷3锟斤拷锟斤拷锟斤拷锟街斤拷1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷思路

锟斤拷锟斤拷2锟斤拷锟斤拷锟矫凤拷锟斤拷锟斤拷

锟斤拷锟�锟斤拷俸铣锟狡斤拷夥�

锟斤拷锟�锟斤拷诜纸锟狡斤拷y锟斤拷1锟斤拷锟接態(t锟斤拷i)锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷2锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟劫匡拷锟斤拷锟皆凤拷锟斤拷

锟斤拷锟�锟斤拷锟斤拷R锟斤拷锟斤拷锟�

锟斤拷锟斤拷3锟斤拷锟絆值锟斤拷锟斤拷

锟斤拷锟斤拷4锟斤拷锟斤拷锟絠锟斤拷锟絵

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絚透锟斤拷

锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷模锟酵碉拷锟斤拷锟絖锟斤拷锟解：

锟斤拷锟斤拷1锟斤拷锟絧锟終

锟斤拷锟�锟斤拷锟�1锟斤拷锟斤拷锟斤拷锟斤拷锟絃——锟斤拷锟終锟斤拷锟斤拷锟斤拷锟斤拷俣却锟叫★拷锟饺★拷锟斤拷锟斤拷锟洁反锟斤拷

锟斤拷锟斤拷锟斤拷2锟斤拷锟斤拷锟杰筹拷锟杰夛拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟終锟侥凤拷锟斤拷

锟斤拷锟�锟斤拷锟�3锟斤拷锟斤拷(n锟斤拷i)锟斤拷锟斤拷锟斤拷處處锟斤拷锟�锟斤拷锟斤拷锟絚锟絓锟接狅拷B(t锟斤拷i)锟給锟絇(gu锟斤拷n)锟斤拷

锟斤拷锟斤拷2锟斤拷锟絧锟斤拷锟斤拷

锟斤拷锟�锟斤拷锟�1锟斤拷锟絪锟斤拷锟斤拷锟缴碉拷锟斤拷锟斤拷锟紹锟絤(x锟斤拷)變锟斤拷锟侥ｏ拷锟斤拷锟斤拷突變锟斤拷

锟斤拷锟斤拷锟斤拷2锟斤拷锟斤拷锟斤拷锟侥凤拷锟斤拷锟斤拷锟絊锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷3锟斤拷锟斤拷锟斤拷锟斤拷c锟侥忥拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷3锟斤拷锟絧锟経

锟斤拷锟�锟斤拷锟�1锟斤拷锟斤拷锟斤拷锟斤拷锟絃锟酵夛拷锟絪——锟截桿锟斤拷锟斤拷锟劫讹拷锟斤拷同锟斤拷

锟斤拷锟斤拷锟斤拷2锟斤拷锟斤拷锟斤拷突變——锟斤拷锟斤拷锟侥达拷小锟絊锟絓锟接匡拷锟斤拷锟斤拷锟斤拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷(x锟斤拷)锟絋锟斤拷锟紹(y锟斤拷ng)锟缴ｏ拷

锟斤拷锟斤拷1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥诧拷锟紼锟斤拷

锟斤拷锟�锟斤拷锟�1锟斤拷锟斤拷锟斤拷锟角凤拷锟斤拷

锟斤拷锟�锟斤拷锟�2锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷小f=锟斤拷umgf=锟斤拷umgcosθ

锟斤拷锟斤拷锟斤拷锟斤拷摩锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絚锟斤拷锟斤拷锟絓锟接凤拷锟斤拷锟洁反

锟斤拷锟�锟斤拷锟�3锟斤拷锟斤拷锟斤拷摩锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟�锟斤拷锟斤拷锟脚ｏ拷D锟斤拷锟缴決锟斤拷

锟斤拷锟斤拷锟給摩锟斤拷锟斤拷锟斤拷牛锟紻锟斤拷锟斤拷锟叫讹拷

锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟�锟斤拷锟�4锟斤拷锟斤拷锟斤拷電磁革拷

锟斤拷锟斤拷2锟斤拷锟斤拷锟絖锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紻

锟斤拷锟斤拷要锟斤拷锟斤拷锟絖锟斤拷規(gu锟斤拷)锟斤拷锟斤拷锟芥及锟斤拷锟絞锟斤拷锟斤拷(y锟斤拷ng)锟斤拷锟斤拷锟紻(zhu锟斤拷n)锟斤拷锟斤拷平锟斤拷锟斤拷锟斤拷

锟斤拷锟�锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷c锟斤拷平锟斤拷姆锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷1锟斤拷锟叫旓拷——變锟斤拷锟斤拷锟斤拷

锟斤拷锟�锟斤拷锟�1锟斤拷锟斤拷锟斤拷(sh锟斤拷)討論锟斤拷

锟斤拷锟�锟斤拷锟�2锟斤拷锟紻锟解法锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟�锟斤拷锟�3锟斤拷锟絆锟睫凤拷锟絰锟斤拷思路

锟斤拷锟�锟斤拷锟�4锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷2锟斤拷平锟斤拷锟紹(t锟斤拷i)計锟姐：

锟斤拷锟斤拷rt锟斤拷锟斤拷锟斤拷锟角猴拷锟斤拷(sh锟斤拷)锟斤拷锟缴讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷——锟较筹拷平锟解法锟斤拷

锟斤拷锟斤拷f12=锟斤拷f3锟斤拷(g锟斤拷u)锟缴凤拷锟絔锟斤拷→锟斤拷锟�

锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷叶锟斤拷锟�锟斤拷锟斤拷锟揭讹拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷

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锟斤拷锟斤拷锟斤拷锟侥傦拷锟斤拷锟斤拷锟斤拷锟斤拷——锟街斤拷平锟解法

锟斤拷锟斤拷∑fy=0

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