915英语怎么写( 三 ) _英语

c.同 b ，依次调节溶液pH值为710、810、910 ，分别测定其旋光度。d.同 b ，依次于50 ℃水浴中及室温下恒温2 h ，分别测定其旋光度，并与起始数据对比，计算消旋比 r ( %) :r =αt/α0 ，其中αt 为 t 时间溶液的旋光度， α0为溶液初始旋光度。
11212 racemization of hydantoin ramification.a. accurately weight 41000g L252 methyl hydantoin, dissolve into distilled water, make up to 250ml, measure the rotation, and the rotation values is the start data of non-racemization. b. Use 6M sodium hydroxide to make the pH to 810, then with 90 ℃ water bath for 2 hours. Measure the rotation with the polarimeter.c. Repeat b, make pH value to 710, 810 and 910, measure the rotation. d. Repeat b, with 50 ℃ and room temperature water bath for 2 hours. Measure the rotation and compare it with the start values. Calculate the racemization ration r ( %) :r =αt/α0 , which αt is measured rotation and α0 is initial rotation. 11213 海因的碱解精确称量41000 g L252甲基海因，溶解于蒸馏水中，定容至 250 mL ，用 NaOH溶液和盐酸分别调至pH = 2、8、12 , 90 ℃水浴反应4 h ，中间取样测定其N2氨甲酰丙氨酸浓度。11213 alkaline hydrolysis of hydantoin accurately weight 41000g L252 methyl hydantoin, dissolve into distilled 。
5.怎样用英语写求职申请英语求职信范例
Dear Sirs,
Please allow me to apply for the position of office clerk which you advertised in "Yangcheng Evening News" of April 9.
I am 28 years of age and unmarried. After receiving my B.B.A. from Xiamen University, I worked for three years as an office clerk at China Great Wall Computer Group (Shenzhen) Company.
For the last two years I have been a secretary to the General Manager of Haicheng Foodstuffs Company, Ltd. in Shenzhen. I am looking for a position of office clerk to increase my experience in business.
I have a wide knowledge of business and thoroughly experienced in all types of office work. Copies of my testimonials are enclosed, and if you are interested in my application, please give me an opportunity of a personal interview at your convenient date.
Sincerely yours,
xxx
英语求职信范例2
Ryan Tolbech 4532 Cahilloval
San Angelo, TX 76902 (915) 942-9313
December 2, 19-- BT&K 2000
18th Street Suite 300 San Angelo, TX 76902
Attention:
Senior Creative Director I am sending you my resume in response to your ad in the May issue of Advertising Age for a Production Artist. I believe I have the skills that your company is seeking, and would like to be considered for the position. I have extensive layout and design experience and enjoy working on precise, detailed projects. My background in 4-color production, camera work, and desktop publishing systems would also be an asset to your company. Working under tight deadlines is the standard of the advertising industry that I come from, and is not a problem for me.
I look forward to meeting with you personally, and reviewing the needs of BT&K in greater detail. I can be reached at the above telephone number.
【915英语怎么写】Let's talk soon, Ryan Tolbech

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