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[25] 劉家浚 .材料磨損原理及其耐磨性 [M].北京 :清華大學出版社 ,1993. 河南科技大學畢業(yè)論文 28 28 致謝 經(jīng)過三 個多月的忙碌和工作，本次畢業(yè)設計已經(jīng)接近尾聲，作為一個本科生的畢業(yè)設計，由于經(jīng)驗的匱乏，難免有許多考慮不周全的地方，如果沒有導師的督促指導，以及一起工作的同學們的支持，想要完成這個設計是難以想象的。 在這里首先要感謝我的導師潘老師。潘老師平日里工作繁多，但在我做畢業(yè)設計的每個階段，從實驗著手到查閱資料，試驗方法的確定和修改，中期檢查，后期詳細性能測試，寫論文等整個過程中都給予了我悉心的指導。我的實驗較為復雜煩瑣，但是潘老師仍然細心地糾正實驗中的錯誤。除了敬佩潘老師的專業(yè)水平外，他的治學嚴謹和科學研究的精神也是我永遠學習的榜樣，并將積極影響我今后的學習和工作。此外，李寧學長也給了我很大幫助，在此提出感謝。 其次要感謝和我一起作畢業(yè)設計的陳夢偉同學、程強同學、喬冉冉同學、李晨亞同學、王文華同學、張安同同學 ，在我做畢業(yè)設計過程中他們給予了我很大的幫助，尤其是陳夢偉 同學，在我做實驗及撰寫論文的過程中給予我莫大的幫助，特此提出感謝。 然后還要感謝大學四年來所有的老師，為我們打下化工專業(yè)知識的基礎；同時還要感謝所有的同學們，正是因為有了你們的支持和鼓勵。此次畢河南科技大學畢業(yè)論文 29 29 業(yè)設計才會順利完成。 最后感謝化工學院和我的母校 — 河南科技大學大學四年來對我的大力栽培。 河南科技大學畢業(yè)論文 30 30 a 您好，為你提供優(yōu)秀的畢業(yè)論文參考資料，請您刪除以下內容， O(∩_∩)O 謝謝！?。 national survey was recently launched to evaluate the eye health of Chinese children a June 6, China39。s annual National Day for Eye Care, the China Youth Development ServiceCenter and Zhejiang Medicine, a leading listed Chinese pharmaceutical pany, jointlyannounced the kickoff of the about one month, a questionnaire piled by top eye care medical experts in China willbe distributed through multiple online partners, including , as well asthrough offline survey events held in universities, middle schools and primary schools acrossthe report will be released based on the survey statistics and analysis, and most importantly,guidelines for parents and youth on how to care for the eyes and prevent myopia — agrowing problem in China39。s digitized society, will also be attached on the report.Myopia is not only a disease that makes people see things blurrily, but also leads to severeplications, such as glaua (increased pressure within the eyeball), and can causeblindness, said Zhou Yuehua, an established eye care specialist with Beijing TongrenHospital.It is very important for parents and children to know about the risk and care for their eyes.There are about 450 million myopia patients in China. Among Chinese myopia patients,30million are severe patients, according to ZhouThe prevalence of myopia among high school and college students is more than 70 percent,and the situation is continuously worsening, he Zhu, director with the China Youth Development Service Center, said long hours ofstudy, lack of exercise, especially outdoor activities, and attachment to electronic screen aresome of the top reasons behind the widespread myopia problems, and the increase ofyounger patients, although China has made great progress in improving the hardwarefacilities and lighting conditions in said he hopes the survey will alert people on the threatening situation, and also helpmedical experts to better guideline parents and children39。s behaviors to care for eyes, basedon the timely and factual statistics the survey series of followup events will also be held in six cities, including Jinan in Shandongprovince, and Changsha in Hunan province, to educate people on how to care for eyes afterthe survey started. More and more Chinese are jogging to get and stay fit. Most joggers will run alone, but some will jog with friends or even coaches. The Beijing Olympic Forest Park is one of the most popular spots. It is packed with runners in the afternoon, usually after work, and at weekends. Jogging after a whole day39。s work can be a way to unwind. It is true for He Wenjun, whose workplace is right near the forest park. She discovered her athletic aptitude at the age of seven, when she began playing tennis. Then she turned to jogging, and she has persevered with it for 10 years. I e to jog almost every day after work, whenever I have time. I think jogging is good for my health. And for me, a girl, it helps me to achieve to eternal goal, to keep slim, He said. He says she prefers jogging alone, so she can focus better. She loves jogging, even during Beijing39。s smoggy days. If the smog is severe, I39。ll hold off jogging for a while. But if I really want to get away from work, I39。ll wear a mask, or just ignore the smog and go on jogging, she said. For those who are not so athletic, jogging also has its attractions. Wu Houbin started roughly two years ago, when he was severely obese. Within two months, his weight dropped from 82 kilograms to 64 kilograms. The success helped him recover health, and he has made friends. Jogging does not require speed, but stamina. If you want to stick to the game, you need to take it as a mission, a habit, and then eventually a hobby, Wu said. But persevering with jog