exercises in english or

Ngày tải lên: 19/03/2014, 23:56

... Society Discussion Points • Explain the stereoselectivity obtained in step a. • Propose a mechanism for the conversion of 2 into 3. • Suggest a structure for the intermediate formed in step ... the main motive for using the D-threose derivative 2 in the synthesis? • Attempts at carrying out the sequence depicted in step e with the benzyl protecting group originally ... selectivity in the Diels-Alder reaction was obtained with the use of the alkyl ester corresponding to 4 or when no catalyst was used. Give reasons for this finding. • Suggest a starting...

Ngày tải lên: 28/03/2014, 20:20

Ngày tải lên: 02/04/2014, 20:48

Ngày tải lên: 02/04/2014, 21:58

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Ngày tải lên: 02/04/2014, 22:07

Ngày tải lên: 02/04/2014, 22:09

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Ngày tải lên: 02/04/2014, 22:15

Ngày tải lên: 02/04/2014, 22:18

... prefers dancing than to sing. D. Mary prefers dancing to singing. 12. It took him two hours to do his homework. A. He spent two hours to do his homework. B. He spent two hours doing his homework. C. ... sing it. C. This song is so simple for us to sing D. It is such simple the song that we can sing it. 8. I haven’t seen her for 3 weeks. A. I haven’t seen her since 3 weeks. B. She was seen for ... two years since Mary began studying Vietnamese. D. All are correct 14. I started going to school in 1997. A. I haven’t been a pupil when it was in 1997. B. I have been a student since 1997. C....

Ngày tải lên: 09/07/2013, 01:26

... all humorous verse forms in English comes from a country in Ireland. One theory says that Irish mercenaries used to compose verses in that form about each other and then join in a chorus of ... translate the following. Explain the use of the nouns in bold type. 1. The Uffizi in Florence have more perfect paintings than any other gallery on the planet — not just Tintorettos and Botticellis, ... month. Ex. 90. Insert the article if necessary 1. beginning of detective story should be mysterious and gripping. 2. beginning of novel was boring but end was fantastic. 3. In big cities people...

Ngày tải lên: 10/12/2013, 13:15

Ngày tải lên: 29/01/2014, 14:35

... detect coliforms in drinking water. Background Coliforms, Indicators of Fecal Contamination Water is routinely tested to ensure that it is safe for drink- ing. A widely used indicator of the suitability ... Kitchen Boiling water has been used for a long time around the home in cooking and disinfecting items, such as baby bottles and canning jars. Drinking water may also require boiling on occasion. For example, ... 2003 EXERCISE 28 L ABORATORY R EPORT N AME D ATE L AB S ECTION Skin Disinfection: Evaluating Antiseptics and Hand Sanitizers Antiseptics 1. In the following table, record your results for antiseptic plates. Record...

Ngày tải lên: 05/03/2014, 21:20

... 2.2 and in the laboratory report. 4. Select one slide from each category in table 2.1 (eight total). Using your ocular calibration results, calculate and record in the laboratory report the size ... cell groupings may vary. 5. Also be sure to depict the morphology of each organism in the circles provided in the laboratory report. Alexander−Strete−Niles: Lab Exercises in Organismal ... basidiospore,is used to classify fungi into groups. (b) Spore types (a) Growth forms Asexual Cup fungus Lichen (fruticose) Sporangiospores Sporangium Sporangiophore Conidia Conidiophore Mold Vegetative cells of...

Ngày tải lên: 05/03/2014, 21:20

... 7 tips for writing in English! 7 mẹo nhỏ cho việc học Viết tiếng Anh Viết là một trong những kỹ năng ngôn ngữ tương ... advice to you is always to remember to take an umbrella; you never know when it might rain. • Ngắn: Don't forget to take an umbrella. 4. Dùng câu rõ ràng Nếu bạn có nhiều ý muốn diễn đạt thì ... biến Dùng những từ mà hầu hết mọi người đều biết và hiểu nghĩa. Ví dụ: • Từ lạ: It was a blistering day. • Từ quen thuộc: It was a hot day. 3. Dùng câu ngắn Viết ngắn, đơn giản và đi thẳng vào...

Ngày tải lên: 02/10/2012, 11:46

Ngày tải lên: 04/10/2012, 10:25