【正文】 熱處理方法。由重復(fù)荷載導(dǎo)致的局部損傷會(huì)引起這種高周疲勞破壞，它導(dǎo)致了微小裂縫的形成，疲勞裂縫的程度隨著后來的重復(fù)荷載而逐漸增大，直到最終有效橫截面積小以至發(fā)生突然破壞，高周疲勞只是當(dāng)在結(jié)構(gòu)物設(shè)計(jì)基準(zhǔn)期可能出現(xiàn)大量的荷載循環(huán)時(shí)的一種設(shè)計(jì)的考慮。脆性破壞由局部高應(yīng)力區(qū)域的微小裂縫的存在或形成而引發(fā)。結(jié)構(gòu)鋼的延性取決于鋼材的組成，熱處理方法和鋼材的厚度，并且隨溫度和應(yīng)變率的變化而變化。在擋土墻的失效模式的數(shù)目可能對(duì)于檢查外部穩(wěn)定，重力墻被視為剛體（即沒有內(nèi)部收益或扭曲）。擋土墻的土壓力主動(dòng)土壓力對(duì)能夠阻止土體塌落、滑移和蠕變?yōu)樽匀黄胶鉅顟B(tài)的任何擋土結(jié)構(gòu)施加水平向和豎直向荷載分量，這些結(jié)構(gòu)在土壓力的作用下會(huì)發(fā)生稍微的屈服。該轉(zhuǎn)角等價(jià)于土壓力作用下20英尺墻體的上表面向外移動(dòng)1/4英寸。對(duì)于粒狀材料來說，水下的浸沒對(duì)內(nèi)摩擦系數(shù)和墻面摩擦系數(shù)的影響非常小。2)An object bees is placed in the being placed in the sun, an object bees 。2)What does a fuse do? It protects a function of a fuse is to protect a 。2)The instruments present include some digital ones which are relative to instruments present include some digital ones relative to 。Electrical energy can be stored in two metal plates separated by an insulating a device is called capacitor or ability to store electrical energy is is measured in farads 電能可儲(chǔ)存在由一絕緣介質(zhì)隔開的兩塊金屬極板內(nèi)。 kind of loads, especially those consume energy calculated by standard coals more over 10 thousands of tons per year, has a name of high energy consuming ，尤其是那些年耗能萬噸標(biāo)準(zhǔn)煤以上的負(fù)荷，被稱為高耗能負(fù)荷。（動(dòng)名詞作主語）By changing the resistance，we can change the ，我們就能改變電流。（定語從句）The instrument that we often use is very good in 。我們可以很容易地買到或制造電阻器，但很快我們發(fā)現(xiàn)這種物理元件只有當(dāng)電流、電壓或者功率處于特定范圍時(shí)其電壓——電流之比才是恒定的，并且這個(gè)比值也取決于溫度以及其它環(huán)境因素。Section 5 Exercise 3 相電壓與相電流之比等于電路的阻抗，符號(hào)為字母Z，阻抗是一個(gè)具有量綱為歐姆的復(fù)數(shù)量。而這種方法被稱為疊加法。（介賓從句）The fact that everything around us is matter is known to 。（賓語從句）The fact is that radio waves travel as fast as light 。 plants fueled by uranium account for a continually increasing share of the load, but their construction is slow and uncertain because of the difficulty of raising capital to meet the sharply rising cost of construction, constantly increasing safety requirements which cause redesign, public opposition to the operation of the plants, and delays in through a circuit, the current will lose part of it ，要損耗掉一部分能量。, loads are devices those consume electric energy or electric power consumed by customers mainly in distribution ，負(fù)荷是主要在配電網(wǎng)中消耗電能的設(shè)備或者由用戶消耗的功率?！癆 per unit of B” 表示 “單位B上的A” 或者“A/B”。3)The testing of a crossfield generator will be described in this section with chief reference to the tests that are normally taken on every machine before it leaves the makers ，它主要涉及每臺(tái)電機(jī)在離開制造廠前應(yīng)進(jìn)行的試驗(yàn)。3)The transistor, which is working with correctly polarities, can work as an transistor working with correctly polarities can work as an ，作用就像放大器。電容的測(cè)量單位是法拉。有些土由于缺少排水及他們自身的性質(zhì)，在任何情況下都可能變?yōu)榱黧w（不管形成的流體材料是大面積的還是僅僅靠墻的一條窄層）；這些土的壓力和與其具有同樣密度的流體的靜水壓力相等。就任意土體材料來說，作用在常見擋土墻上的主動(dòng)土壓力水平分量可由針對(duì)墻背豎直、墻后填土面基本水平的一般土壓力楔體理論很好地給出。也可能是地球的壓力造成的垂直分量的支持時(shí)，面對(duì)的不垂直，地面是傾斜的或在墻上摩擦是包括在內(nèi)。 Pressures重力式傳播的穩(wěn)定條件設(shè)計(jì)必須考慮的不是最終或使用極限狀態(tài)，計(jì)算表明，必須有足夠的經(jīng)費(fèi)是對(duì)發(fā)生不良極限狀態(tài)有關(guān)一個(gè)特定類型的墻體了。高集中應(yīng)力促進(jìn)裂縫開展，所以由不良的幾何形狀和荷載布置引起的應(yīng)力集中都很危險(xiǎn)，而且材料的裂紋和缺陷也非常重要。它也將有利于限制，如可行，接頭的地點(diǎn)，如在接近中性軸點(diǎn)，低應(yīng)力區(qū)。通常認(rèn)為，單向拉伸所確定的屈服應(yīng)力對(duì)單向壓縮也正確。屈服應(yīng)力隨著熱處理方法和壓制過程的工作量而變化，在同樣的條件下壓制次數(shù)多的薄板的屈服應(yīng)力高于較厚的鋼板。它包括兩個(gè)階段：；。然而減少幾公里長(zhǎng)的路肩寬度，得不到同樣的的結(jié)果。Whatever design speed is selected, adequate transitions（轉(zhuǎn)變、過渡）from the freeway proper and at the ramp terminal（末端、末尾）or merge point（合流點(diǎn)）should be ，都應(yīng)該發(fā)展來自高速公路本身的和在匝道末尾或者合流點(diǎn)的合適的過渡。1System design Run environment of systemThe running environment of intelligent C language examination system, which is according to our schoolstaff of educational technology center puter room of existing hardware environment(There are around fifty students machine terminal and a teacher machine terminal in the machine room)to be planned in present teacher machine terminal and students machine terminal adopt Window XP oper