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3、中文翻譯 龍門式起重機金屬材料的疲勞強度預(yù)測 郵箱 64，郵編 620107，俄 收到 1998年 4月 3日；接受 1998年 9月 29日 摘要 內(nèi)在的疲勞曲線應(yīng)用到 龍門式起重機金屬材料的 疲勞壽命預(yù)測問題。起重機，用于在森林工業(yè)中，在伐木林場對各種不同的工作條件進行研究，并且做出相應(yīng)的應(yīng)變測量。對載重的循環(huán)周期進行計算，下雨循環(huán)計數(shù)技術(shù)得到了使用。在一年內(nèi)這些起重機運作的樣本被觀察為了得到運作周期的平均數(shù)。疲勞失效分析表明，一些元件的故障是自然的系統(tǒng)因素，并且不能被一些隨意的原因所解釋。 1999年 留所有權(quán)利。 關(guān)鍵詞：起重機 。

4、S 2737:1999 of N 2737:1999 of a 9995 999 3 580 32336 6is N 2737:1999. It is 2737:1996. It S 7448991 be S 7448991 it is to in lc of ), in S 7448448-2 S K in , of , to to on or K in K.A of on be on to is to EN an to be in or by of to of a a of of a an i N , SO ii to 3 a be in on 999 3N 2737 2737999 of 2737:1996) du dde 2737:1996) (2737:1996)EN to of a be to or to EN in A in by of a to as 6, 1999 ll of in by EN 2737:1999 999 3of C 164 “of of as be of a by of an or by at 99。

5、人教版九年級化學(xué)下冊,實驗活動4金屬的物理性質(zhì)和某些化學(xué)性質(zhì),本節(jié)導(dǎo)讀,一、創(chuàng)設(shè)情景明確目標(biāo),我們的身邊哪些物品是由金屬材料制成的？你知道它們是由什么金屬材料制成的嗎？,身邊金屬大搜索,一、創(chuàng)設(shè)情景明確目標(biāo),銅,鐵,鋁,鈦,二、自主學(xué)習(xí)指向目標(biāo),自讀課本P24,完成學(xué)生用書當(dāng)堂作業(yè)部分。,三、合作探究達成目標(biāo),探究點一：金屬的物理性質(zhì),金屬材料,合金,純金屬,物理性質(zhì),共性,特性,用途。

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7、英文原文： of of a to a of of a A in in at a an of of is of a of a of to be in be by 999 . of of of in as in of in in at to a 2 000 of at of to to of 2. of or a at in a to or of A so A of is 1. 13509/$一 1999 S 1 3 5 0 一 6307(98) 00041 一 7 A of be of if of is a of a of a on an to on of of is to be a to of a is on k=1.4 of of t is is be as a of of of 3 to is by of an on of to be of in be in in in in 18 of it is to g(t) as of is be to of an It be to of to is to of a of。

8、單元1金屬材料和金屬冶煉,課時1,學(xué)習(xí)目標(biāo),1.認識金屬材料在日常生活和農(nóng)業(yè)生產(chǎn)中的重要作用；2.知道合金的定義，在此基礎(chǔ)上初步建立“混合”能改變物質(zhì)性質(zhì)的化學(xué)觀念。,金屬材料的發(fā)展史,青銅器,鐵器,鋁器,說一說下列常見的物質(zhì)都是由哪些金屬制成的？,公交車,廚房用品,燈泡,一、用途廣泛的金屬和合金,金屬材料,鐵鍋,不銹鋼鍋,金屬材料的種類,合金：由一種金屬跟其他金屬（或非金屬）熔合形成的有金屬特性。

9、第2課時金屬資源的利用和保護,氧氣,水蒸氣,Fe2O3xH2O,潔凈干燥,保護膜,內(nèi)部結(jié)構(gòu),不銹鋼,腐蝕,回收利用,計劃,合理,代用品,鐵的銹蝕和保護1.鐵生銹實際上是鐵與空氣中的氧氣、水蒸氣發(fā)生化學(xué)反應(yīng)。2.鐵銹很疏松,對內(nèi)部的鐵起不到保護作用。3.防止鐵生銹的基本思路是破壞鐵生銹的一個或兩個條件,即使鐵制品隔絕空氣或水或?qū)烧咄瑫r隔絕。4.對廢棄的金屬物品進行回收利用的意義主要從兩個方面考慮。

10、金屬和金屬材料,第八單元,章末小結(jié),2,3,4,1,知識網(wǎng)絡(luò),知識網(wǎng)絡(luò),易錯辨別,1鐵粉作雙吸劑和鐵生銹的原理相同。()2要除去銅粉中混有的少量炭粉，可采用在空氣中充分灼燒混合物的方法。()3置換反應(yīng)前后，組成各物質(zhì)的所有元素的化合價一定不變。()4可以用稀硫酸鑒別黃金和銅。(),易錯辨別,5鋁在空氣中能穩(wěn)定存在，說明鋁的活潑性不強。(。