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Questions 191-195 refer to the following advertisement and note. Bidding for Contributions 1. This magazine is mainly intended for the teachers and students of university. It is published on the fifteenth of every month in Los Angeles. 2. Contributions in all forms and all styles are warmly welcome, including: ·Fables, poems, skits, folksongs; ·Technical and scientific writing and essays; ·Essays on phonetics, grammar and language; ·Speeches, dialogues and lectures; ·Articles about sports and recreational activities, riddles and games, humor and jokes, and cartoons; ·Background knowledge about history and geography, travel notes and biography; ·Translated articles, bilingual readings, theories and techniques of translation; ·Study notes and teaching plans. 3. Contributions are expected to be within a 4,000 word limit. They should be printed clearly on the size of A4 paper. 4. Translated articles should be accompanied with the original. Quotations must be noted with their Sources. 5. Manuscripts, if not accepted for publication, will be returned to the sender within three month. 6. Contributions will be paid after their manuscripts are published. 7. Manuscripts may be published in the authors’ real names or in their pen names as they wish. 8. Contributions should be sent directly to the editorial board, not to individuals. Our address is: 207 Green Avenue, Los Angeles, Editorial board of the monthly magazine English Teaching and Learning in Colleges. Editorial Board of Monthly Magazine English Teaching and Learning in Colleges NoteDear Lucas, How are you I want to know whether you have seen the "contribution wanted" in the newspaper on Sunday. I feel that the composition you write last week is excellent. It is a good essay about English learning. You can send it to the magazine of English Teaching and Learning in College. If you feel it is not perfect enough, you can e-mail your composition to me, and I can help you revise it. I write the note to you and enclose the newspaper. Please contact me with e-mail. 157 teacher@hotmail. com. Best wishes, Yours Professor Lee Why does Professor Lee write to Lucas
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Peek through the inspection windows of the nearly 100 three-dimensional (3D) printers quietly making things at RedEye, a company based in Minnesota, and you can catch a glimpse of how factories will work in the future. It is not simply that the machines run day and night【C1】______by just a handful of technicians.【C2】______it is what they are making that shows how this revolutionary production process is【C3】______the manufacturing mainstream. 3D printers make things by building them up, a layer at a time,【C4】______a particular material, rather than【C5】______it by cutting, drilling or machining—which is why the process is also called additive manufacturing. There are many ways in which this can be done, and with only a【C6】______adjustment of software each item can be different,【C7】______the need for costly retooling of machines. This has made 3D printing a【C8】______way to make one-off items, especially prototype parts, mock-ups, small mechanical【C9】______and craft items. And that is about all that 3D printers are good for,【C10】______the doubters. Chief among them is Terry Gou, the boss of Foxconn. He thinks 3D printing is just "a trick" without any【C11】______value in the manufacture of real finished goods, and he has vowed to start spelling his name backwards if【C12】______wrong. Mr. Gou is right about one thing: additive manufacturing is not about to replace mass manufacturing.【C13】______the technology is improving, the finish and durability of some printed items can still【C14】______what producers require. And nor can 3D printers produce millions of【C15】______parts at low cost, as mass-production lines can.【C16】______3D printers have their【C17】______which is why they are starting to be used by some of the world"s biggest manufacturers, such as Airbus, Boeing, GE, Ford and Siemens. The market for 3D printers and【C18】______is small, but growing fast. Last year it was worth $2.2 billion worldwide, up 29% from 2011. As producers become more【C19】______with the technology, they are moving from prototypes to final【C20】______. 【C19】
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