土木工程材料答案-資料下載頁
2025-06-28 18:54本頁面
【正文】 As the few remaining working telephone lines will be very busy ,all of the family members should call to check in with a friend or relative who leave far away from the earthquake stricken area因此，以蓋茨為首席執(zhí)行官的微軟還能走多遠(yuǎn)依然是個(gè)有趣的問題（as to） An interesting question therefore remains as to how far Microsoft can go with Gates as its CEO.抱怨是沒有用的，因?yàn)楸г共⒏淖儾涣耸裁?，重要的是的采取措施預(yù)防類似事件的發(fā)生There’s/It’s no use plaining since nothing ever changes as the result of a plaint. What’s important is to take measures to prevent similar events from happiness.要學(xué)會(huì)接受這樣一個(gè)事實(shí)：有些你認(rèn)為是朋友的人結(jié)果是敵人（turn out）Learn to accept the fact that some people you thought were friends turn out to be enemies.正如你能從書名期待的那樣，書里多處提到蓋茨是怎樣的人（expect to）As you would expect from the book’s title, there are many references to what kind of man Gates is.該公司的興隆源于公司上下人人克勤克儉（steam from）The prosperity of the pany stems from hardworking and thrifty of the entire staff.就星期六晚上上演的那出戲，他什么也沒說（on the subject of）He said nothing at all on the subject of the play which was put on for the first time Saturday night.I have in fact no explanation to offer as to how he died that evening ,and it may be that no possible explanation will ever be given . 至于那天晚上他是怎么死的，事實(shí)上我無法解釋，而且也許不會(huì)有任何可能的解釋了There is no use doing something and then saying you did not mean to do it, had you mean to do it, you would not have done it 做了一件事然后說自己本來不想那樣做是沒有用的；如果你不想做，你就不會(huì)做了。Microsoft is working on ways to reduce the cost of its products so that people in developing countries can afford them 微軟公司正在研究降低其產(chǎn)品成本的方法，以便發(fā)展中國家的人也能買得起。Apple also will bundle some of its software with Microsoft products to help boost its sales 蘋果公司也愿意將其部分軟件與微軟公司的產(chǎn)品捆綁在一起，以促進(jìn)其銷售。Unlike fathers, mothers are judged by their parenting successes or failures, for mothers, every thing depend on how their kids turn out與評(píng)價(jià)父親不同，人們評(píng)價(jià)母親依據(jù)的是其為母之道的成功或失敗。對(duì)于母親來說，一切都取決于孩子最終成為什么樣的人。People will find the website invaluable as we have put in a lot of time to prepare the information 人們會(huì)發(fā)現(xiàn)這個(gè)網(wǎng)站很有價(jià)值，因?yàn)槲覀兺度肓舜罅繒r(shí)間準(zhǔn)備網(wǎng)站保證桿件正常工作的基本要求：具有足夠的強(qiáng)度、剛度、穩(wěn)定性材料力學(xué)研究對(duì)象的基本假設(shè)：連續(xù)性假設(shè)，均勻性假設(shè)、各向同性假設(shè)內(nèi)力：桿件內(nèi)部之間的相互作用力比例常數(shù)E為彈性模量（材料的固有性質(zhì)）拉伸的四個(gè)階段：彈性階段、屈服階段、強(qiáng)化階段、局部變形階段力偶矩推導(dǎo)等直圓桿扭轉(zhuǎn)時(shí)橫街面上切應(yīng)力的計(jì)算公式所需要考慮的綜合條件：先從幾何方面和物理方面求得切應(yīng)力在橫截面上的變化規(guī)律，然后再從靜力學(xué)方面來求解。單位長度扭轉(zhuǎn)角：剛度通常用相對(duì)扭轉(zhuǎn)角沿桿長度的變化率，即單位長度扭轉(zhuǎn)角荷載的微分關(guān)系及其物理意義： 對(duì)彎矩函數(shù)求導(dǎo)，得剪力函數(shù)，對(duì)剪力函數(shù)求導(dǎo)，得均布荷載q塑性材料和脆性材料 許應(yīng)拉應(yīng)力與中興軸的微分關(guān)系？？？梁變形后倆個(gè)基本物理量 撓度、轉(zhuǎn)角邊界條件：撓度和轉(zhuǎn)角都為0 的點(diǎn)提高梁的剛度條件：增大梁的彎曲剛度EI、調(diào)整跨長和改變結(jié)構(gòu)拉壓超靜力問題的綜合求解條件：運(yùn)用變形的幾何相容條件力變形間的物理關(guān)系和靜力學(xué)的平衡條件三方面來求解應(yīng)力狀態(tài)：受力桿件內(nèi)一點(diǎn)處不同方位截面上應(yīng)力的集合，稱為一點(diǎn)處的應(yīng)力狀態(tài)一點(diǎn)處切應(yīng)力等于0的截面稱為主平面，主平面上的正應(yīng)力稱為主應(yīng)力材料破壞的基本類型：脆性斷裂、塑性屈服組合變形：若幾種變形所對(duì)應(yīng)的應(yīng)力屬于同一數(shù)量級(jí)，則構(gòu)件的變形稱為組合變形按疊加原理計(jì)算組合變形橫截面上的正應(yīng)力時(shí)，忽略了那些？截面核心：當(dāng)外力作用點(diǎn)位于截面型心附近的一個(gè)區(qū)域內(nèi)時(shí)，就可以保證中性軸不與橫截面相交，這個(gè)區(qū)域稱為界面核心臨界壓力：中心受壓直桿在直線形態(tài)下的平衡，由穩(wěn)定平衡轉(zhuǎn)化為不穩(wěn)定平衡時(shí)所收軸向壓力的界限值，稱為臨界壓力歐拉公式適用范圍：10 / 10
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