【文章內(nèi)容簡介】 ent, resour ces, water, economic development advant age advant age, advantage as policy overlap, cultur al enr ichment, and indust rial boards, insti utional weakness, shor t people short , shor t of funds and t alent . Fr om t he per spect ive of ecological envir onment , our egion as an import ant guarant ee of nat ional ecological saf ety, high f or est cover , wat er , air and soil environment al indicat or s, such as t he natur e, is t he development of green f ood and preser ving pension ideal places, forest carbon sinks and other indust ries. From t he per spect ive of the prior it y of characteristic r esources, wild blueberr y, Nort her n f orest r esour ces such as drugs, big snow, big wetlands, River and f orest tourism r esources, variet y, large reser ves of mineral r esources such as m olybdenum, lead and zinc, has t r anslat ed int o str ong material conditons for economic advantage. Economic development out of t he water, t otal m or e t han 16 bilon cubic meter s of sur face water r esources and hydroj unction project of development pr ospects。 r ecover able r eserves of high qualit y m iner al wat er r esources milon t ons , is t he base of rare natural and polution free mineral wat er . Seen f rom t he advantages of cult ur al enr ichment, wit h Nor thern cult ure, and Xianbei cult ur es, Or oqen cult ure and a number of cult ural r esour ces, r ock only f ound m or e t han 1000 paint ings, cult ural indust ry development has great potent ial. Fr om t he perspective of policy overlap advantage, wit h t he St at e For estr y Administ ration and t he provincial gover nment wo channels of policy t owar ds dir ect enjoyment of natural f orest protection program, Western development , r esource based cit ies sust ainable development and main f unct ion region const ruction nat ional policy planning. As long as we put these r esour ces to use and exploit t he advantages of good, could give guanghui, snow, cold r egion and black Glebe int o gold and silver , wil pr ovide str ong suppor t f or f orest development . ( In addit ion to J ia Shuji m entioned advantages, XX we have in agricult ur e, water conservancy and other unique r esources. Agricult ural r esour ces, m ilon m u of arable land t hroughout he Count y, da hinggan Ling was t he only predom inantly r ural administr ative dist rict s, green planting area of 850, 000 acr es. Wat er r esour ces, in a r iver over more t han 180, many r iver hydr opower developm ent pr oject conditons, r ich in t hree five Luo and A． 2 B． 3 C． 4 D． 5 10．力偶可以在它的作用平面內(nèi) ( )，而不改變它對(duì)物體的作用。 A．任意移動(dòng) B．任意轉(zhuǎn)動(dòng) C．任意移動(dòng)和轉(zhuǎn)動(dòng) D．既不能移動(dòng)也不能轉(zhuǎn)動(dòng) 二 、判斷題（每小題 2 分，共計(jì) 30 分。將判斷結(jié)果填入括弧，以√表示正確，以 表示錯(cuò)誤） 1．約束是阻礙物體運(yùn)動(dòng)的限制物。 ( ) 2．力沿坐標(biāo)軸方向上的分力是矢量，力在坐標(biāo)軸上的投影是代數(shù)量。 ( ) 3．力系簡化所得的合力的投影和簡化中心位置有 關(guān)，而合力偶矩和簡化中心位置有關(guān)。( ) 4．幾何不變體系是指在荷載作用下，不考慮材料的位移時(shí)，結(jié)構(gòu)的形狀和位置都不可能變化的結(jié)構(gòu)體系。 ( ) 5．沒有多余約束的幾何不變體系組成的結(jié)構(gòu)是超靜定結(jié)構(gòu)。 ( ) 6．平行于梁橫截面的內(nèi)力是剪力，作用面與梁橫截面垂直的內(nèi)力偶是彎矩。 ( ) 7．軸向拉伸 (壓縮 )的正應(yīng)力大小和軸力的大小成正比，規(guī)定拉為正，壓為負(fù)。 ( ) 8．安全因素取值大于 1 的目的是為了使構(gòu)件具有足夠的安全儲(chǔ)備。 ( ) 9．壓桿上的壓力大于臨界荷載，是壓桿穩(wěn)定平衡的 前提。 ( ) 10．梁橫截面豎向線位移稱為撓度，橫截面繞中性軸轉(zhuǎn)過的角度稱為轉(zhuǎn)角。 ( ) 11．圖乘法的正負(fù)號(hào)規(guī)定為：面積 ? 與縱坐標(biāo) 0y 在桿的同一邊時(shí)，乘積 0y? 應(yīng)取正號(hào)；面積 ? 與縱坐標(biāo) 0y 在桿的不同邊時(shí)，乘積 0y? 應(yīng)取負(fù)號(hào)。 ( ) 12．結(jié)點(diǎn)角位移的數(shù) 目就等于結(jié)構(gòu)超靜定的次數(shù)。 ( ) 13．物體系統(tǒng)是指由若干個(gè)物體通過約束按一定方式連接而成的系統(tǒng)。 ( ) 14．有面積相等的正方形和圓形，比較兩圖形對(duì)形心軸慣性矩的大小，可知前者比后者大。 ( ) 15．計(jì)算簡圖是指經(jīng)過簡化后可以用于對(duì)實(shí)際結(jié)構(gòu)進(jìn)行受力分析的圖形。 ( ) 三 、 計(jì)算 題（共 40 分） 1． 計(jì)算 下 圖所示桁架的支座反力及 2 桿的軸力。（ 10 分） 2．畫出下圖所示梁的內(nèi)力圖（ 10 分）。 2020 lear ning im plement t o t ube m ain leaders topic seminar spir it counselling m at er ial 2020 learning im plement o tube main leaders t opic seminar spir it counselling m aterial M arch 7, XI Gener al Secretar y t o Ipr ovince delegat ion par ticipate in considered and published has im port ant speech, on XXX pr ovince people for China r evolution victor y and Socialist const ruct ion made of contr ibut ion give has cert ainly, on Ipr ovince past f ive year s im plement at ion focus str at egy, and gr asp focus indust ry, economic social development made of result s give has cert ainly, Clarif ied the demands f or development of XXX, r ef er ring t o bot h dir ect ions, tasks and issues, t eaching met hods, for t he cur rent and f uture development in Heilongjiang pr ovince, is of gr eat pract ical signif icance and far reaching hist orical signif icance. Mar ch 22 to 24th, pr ovincial held has province t ube main leader s t opic seminar, pr ovincial Secr et ar y Wang Xiankui r ade in seminar opening pr ovince do has import ant speech, Wang Xiankui st r essed: in depth learning acquisiton Gener al Secretar y of speech, is on XXX a polit ical account , we m ust put lear ning im plement XI Gener al Secretar y im por tant speech spir it as major polit ical t ask, adapt ed and led economic development new nor mal, insisted to economic const ruction f or Cent er not shake, implement im plementat ion ew development concept, weaknesses, and swager gr ams shor t, and yangchangbuduan, St imulate t he endogenous dynamics, f ormation eff ect of EMU, f ir m im plementation of the five planning, the development of key indust ries, open Dr agon River pr ehensive revitalization new journey, st ruggling t o get out of a high qualit y, ef ficient, bet ter st ruct ure and development r oad of r evit alizat ion of t he advantages int o f ul play. M ar ch 29 to 30th, t he Commit t ee anized a pi e major themat ic seminar of leading cadr es prefect ural rade J ia Yumei made an import ant speech at t he opening ceremony. J ia Shuj i str essed, f ul dist rict upper and lower must o ef f ect ive enhanced lear ning publicit y im plement implementation XI General Secr et ar y im port ant speech spir it of polit ical consciously, and t hought consciously, and action c