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- 英语学霸,帮忙啊啊啊啊
- 英语学霸,帮忙啊啊啊啊如图,这道改错题请大家帮忙看看,谢谢。我要问的如图。
2018-12-04 13:25:20
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- 射线探伤是怎么回事啊啊啊啊??
- 说说这事儿的危险性。... 说说这事儿的危险性。 展开
2007-09-09 03:58:55
419
2
- 英语学霸帮忙,语法填空
2018-06-08 01:10:47
665
1
- 电解时电极材料对电解有什么影响啊啊啊啊啊,急啊啊啊啊啊
2014-08-06 17:49:31
401
1
- 为什么电脑上清 投影仪不清啊啊
- 有用过投影仪的吗电脑输出的视频到投影仪怎么不请了,正常吗输出1024*7684:3的屏幕哦。... 有用过投影仪的吗电脑输出的视频到投影仪怎么不请了,正常吗 输出 1024* 768 4:3的屏幕哦。 展开
2014-01-08 19:01:12
363
4
- 二氧化硫会燃烧吗? 啊啊啊啊啊
2013-10-24 08:34:13
391
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- 阀门打开 水龙头就是没有水啊啊
- 总阀门水关了打开后水流就变小了,再关了阀门再开就没有水了是所有水龙头都没有水可是阀门是好的,扭的动也扭的到底,而且扭的时候也有阻力。在水流中等的时候,曾经厕所冷水方向出热... 总阀门水关了 打开后 水流就变小了, 再关了阀门再开就没有水了 是所有水龙头都没有水 可是阀门是好的,扭的动 也扭的到底,而且扭的时候也有阻力。 在水流中等的时候,曾经厕所冷水方向出热水,并且天然气也打开了。 求解求解 现在停水啊啊啊 小区都没有停水。 展开
2013-03-09 14:29:03
776
3
- 谁来帮我PS一下这几张图啊啊!
- 我们学校要举行文艺表演了,我们呢就有一个小品。这次的活动涉及到宣传和质量。我觉得要靠实力我们肯定能赢,但在宣传方面就差多了。我听说芋头的PS图片特别棒,就想请你们帮帮忙,帮我PS这几幅图好不好? http://hiphotos.baidu.com/%C3%CE%D1%A9%B3%BF%C7%E... 我们学校要举行文艺表演了,我们呢就有一个小品。这次的活动涉及到宣传和质量。我觉得要靠实力我们肯定能赢,但在宣传方面就差多了。我听说芋头的PS图片特别棒,就想请你们帮帮忙,帮我PS这几幅图好不好? http://hiphotos.baidu.com/%C3%CE%D1%A9%B3%BF%C7%E9/pic/item/b75ac14475e8468cb3b7dc16.jpg http://hiphotos.baidu.com/%C3%CE%D1%A9%B3%BF%C7%E9/pic/item/f7ad005999f3cb242934f010.jpg http://hiphotos.baidu.com/%C3%CE%D1%A9%B3%BF%C7%E9/pic/item/9296f31361a1d58e6438db11.jpg 尽量给人一种舒适的感觉! 展开
2007-12-28 09:45:49
320
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- 火山打字怎么打.有什么技巧么.啊啊
2018-11-10 19:58:46
288
0
- 恒光智能康复仪算是什么ZL法,安全不啊啊?
2012-12-09 04:34:58
294
1
- 帮忙翻译成英语
- 1.掌握量热装置的基本组合及电热补偿法测定热效应的基本原理2.用电热补偿法测定KNO3或KCL在不同浓度水溶液中的积分溶解热3.用作图法求KNO3或KCL在水中的微分冲淡,积分冲淡热和微分溶... 1.掌握量热装置的基本组合及电热补偿法测定热效应的基本原理 2.用电热补偿法测定KNO3或KCL在不同浓度水溶液中的积分溶解热 3.用作图法求KNO3或KCL在水中的微分冲淡,积分冲淡热和微分溶解热 还有:1。测定蔗糖转化的反应速率常数和半衰期 2.掌握旋光仪的使用方法 不要用翻译网站翻啊······麻烦各位了 展开
2008-03-29 00:43:16
329
1
- 帮忙翻译一段英语
- Plant material and culture conditions have been described (7). Briefly, a diploid tissue culture line, WOO1C, of wild carrot, Daucus carota L., was maintained in Murashige and Skoog medium supplemented with 0.1 mg of 2,4-dichlorophenoxy... Plant material and culture conditions have been described (7). Briefly, a diploid tissue culture line, WOO1C, of wild carrot, Daucus carota L., was maintained in Murashige and Skoog medium supplemented with 0.1 mg of 2,4-dichlorophenoxyacetic acid (2,4-D). To regenerate plants from the culture, callus tissue was transferred to the same medium devoid of 2,4-D (embryogenic medium). All experiments were performed with cultures grown in liquid medium. For convenience, cultures grown in 2,4-D-containing medium are referred to as "callus cultures", and those grown in medium without 2,4-D as "embryo cultures." The growth of callus cultures was measured by the sidearmturbidity method (7). The number of cells at any time point of growth was estimated from turbidity in a Klett-Summerson calorimeter and was expressed in arbitrary units. For example, Klett 100 corresponds to ="2 X 106 cells per ml. The relationship is linear up to Klett 150 in our Klett-Summerson colorimeter. Suspension cultures ofWOOLC cell line are normally maintained at cell densities between 106 and 107 cells per ml in 0.1 mg of 2,4-D per liter (high-density culture) in shake flasks. During a quantitative study on embryogenesis, we found that maximal embryo production can be achieved by first incubating the culture at high density in medium without 2,4-D for one generation time and then diluting it to 2-3 x 104 cells per ml (low-density culture). To compare cultures of comparable density, callus cultures and embryo cultures were subjected to the same procedure. To initiate low-density embryo or callus cultures, an 8-day-old high-density culture grown at the logarithmic phase was washed three times with fresh callus or embryogenic medium and resuspended at 8 x 105 cells per ml for one generation (3 days) in its corresponding medium. It was then diluted to 2 x 104 cells per ml; 20 ml of the culture was incubated in a plastic Petri dish (9 cm in diameter) at 240C. The morphogenetic events of the cultures were examined and photographed under a dissecting microscope. 请不要用google的那个,我看不懂~~ 展开
2008-02-19 03:32:04
466
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- 哪位学霸给我讲解讲解化学方程式
2017-12-31 02:51:54
295
1
- 打火机烧了塑料的胶管子融化了弄到了衣服上 怎么去除啊啊
- 同学今天玩打火机然后把水彩笔芯烧了粘在我衣服上了洗都洗不掉就是那种很软的胶管子塑料的跟吸管一样的材质怎么才能洗掉啊求你们解答啊啊啊... 同学今天玩打火机 然后把水彩笔芯烧了粘在我衣服上了 洗都洗不掉 就是那种很软的胶管子 塑料的 跟吸管一样的材质 怎么才能洗掉啊 求你们解答啊啊啊 展开
2012-11-28 03:08:30
796
3
- 求助:帮忙帮忙,机械英语NB的帮忙翻译下
- The effect of beam diameter on the electron skirt in a high pressure scanning electron microscope R. Belkorissata, A. Kadouna, B. Khelifab, C. Mathieub,* aLaboratoire d’Elaboration et de Caracte´risation des Mate´riaux, Univ... The effect of beam diameter on the electron skirt in a high pressure scanning electron microscope R. Belkorissata, A. Kadouna, B. Khelifab, C. Mathieub,* aLaboratoire d’Elaboration et de Caracte´risation des Mate´riaux, Universite´ Djilali Liabe`s de Sidi Bel-Abbes, BP 89, 22000 Sidi Bel-Abbe`s, Algeria bCentre de Calcul et de Mode´lisation de Lens, University D’Artois, Faculte´ Jean Perrin, SP 18 Rue Jean Souvraz, 62307 Lens cedex, France Received 9 February 2004; accepted 19 March 2004 Abstract Helium gas and air are commonly used in the high pressure scanning electron microscope (HPSEM). The presence of a gaseous environment in the specimen chamber modifies the electron beam profile. In order to fully understand the beam-gas interaction, we have investigated the beam-diameter effect for two gases (helium and air) by Monte Carlo simulation. In this calculation, we have assumed that the electron beam is Gaussian and we have explored the influence of the nature of the gas at low voltage. When the beam diameter varies between 1 and 100 nm, there is no influence on the beam profile for these two gases. The resolving power of the HPSEM is not affected by the beamgas interaction. These theoretical results have been compared with experimental images obtained at low voltage under air and helium gases. The variation of image quality at low voltage has confirmed the interest of helium for use in a Field Emission Gun SEM (FEGSEM) in high pressure (or low vacuum) conditions. q 2004 Elsevier Ltd. All rights reserved. Keywords: High pressure scanning electron microscope; Monte Carlo; Electron scattering; Electron profile; Skirting 展开
2018-11-27 12:36:26
407
0
- 学英语出来干什么呀?
2005-08-28 03:19:22
310
6
- 第四题求解 要分析谢谢学霸
2015-12-11 03:46:31
463
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- 英语高手帮忙翻译一下
- ThequalitysystemofthecompanyisinconformitywithISO9002.Makingcomprehensiveuseofbiotechnology,thecompanyspecializesinmanufacturingandsellingC-4seriesorganicacidsandchiralpr... The quality system of the company is in conformity with ISO 9002 . Making comprehensive use ofbiotechnology, the company specializes in manufacturing and selling C-4series organic acids and chiral products. These products are widely used in many fields such as food, phamaceutical and chemical industries, and are well accepted by the overseas markets. The man products are L-Malic acid , DL-Malic acid, L(+)-Tartaric acid , Fumaric acid, Maleic acid and other organic acids. Annual productivity amounts to 20,000 tones. The company has become an important manufacturer of C-4 series organic acids in the world . All the products of the company have respectively met the different international aadvanced standards such as Food chemicals Codex, U.S. Pharmacopoeia ,British Pharmacopoeia and the products have obtained Star-K Kosher certificate. Above 70% of the Companys products are exported to Japan, Europe, Australias, the United states and middle East , and they are renown and well recognized in the international markets. The company will devote itself to research and development of enzyme technology and organic electrochemistry. It will continuously introduce new food additives, chiral pharmaceutical intermediates, chiral auxiliaries and chiral drugs. Depending on superior quality, good service and high reputation, the company is willing to establish a long-term mutually beneficial business partnership with overseas customers and continue contribute to the happy life of humans. 展开
2009-09-17 10:19:02
515
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- 医学影像学专业但英语不好 能学吗
2016-06-25 19:43:17
376
1
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