1. Let me introduce myself. I am Tom.

^99mTc-Trodat-1（锝［^99mTc］巯胺托品）注射液，作为脑受体显像剂，它含有两种非对应异构体，都有生物活性，都能够透过血-脑脊液屏障特异性地与下列哪种结合，亲和性和特异性较好（）

A. 神经内分泌肿瘤受体蛋白

B. 生长抑素受体蛋白

C. 血管活性肠肽受体

D. 雌激素受体蛋白

E. 多巴胺转运蛋白

Write an introduction to an informative speech on the topic of bike-sharing business such as Ofo and Mobike. Refer to the “Sentence Patterns”for opening a presentation in 3-1. Make sure your introduction includes the following elements（假如你要作一篇有关共享单车的演讲，请为演讲写一段开场白，必须包括以下几个要素，请参照3-1章节“Sentence Patterns”文件中所提供的句型）： Getting audience’s attention (Attention-grabber) Introducing yourself (Credibility statement) Stating the purpose of your presentation （Objective tatement） Relating the topic to the audience (Relevance to the audience) Outlining the structure of your presentation (Overview of main points) Stating how you want to deal with questions (Q&A plan) A sample introduction（以下为开场白的例子及功能说明）： (Attention grabber: ) If I could have anybody’s attention? (Greeting:) Good morning, ladies and gentlemen. (Credibility statement:) I am Martin Smith, the associate professor of Civil & Environmental Engineering, (Objective statement:) and I’m here today to share with you something about my Ph.D. project at the Department of Civil and Environmental Engineering at the University of Science City. (Overview:)The title of my talk is “Environmental Mitigation in Transportation Projects.” I will start with an introduction to the project, then explain the experimental techniques, next present the most important results, and finally I hope to draw a few conclusions and I also want to acknowledge a few people. (Relevance to audience:) I hope today’s topic is of particular interest to those of you who are exploring the multifaceted considerations surrounding environmental engineering problems on local and global levels. (Q&A plan:) If you have any questions, I'll be happy to answer them as we go along. （Useful expressions for the topic: bike-sharing business共享单车，a form of urban transportation城市交通的一种方式，solution to traffic jam解决交通拥堵的方法，attract attention and funding吸引关注和投资，parking stations停车站，public bike rental service公共自行车租赁服务，QR code二维码，GPS positioning卫星定位，smart lock智能锁，station-free 无需停车桩的，sharing economy共享经济 ）

请选出下列包含从句最多的一句 （单选） 1) As a result, the practice has produced enormous waste that is unable to be recycled and caused an environmental disaster. 2) Another important factor contributing to the phenomenon is that people are used to leading a lavish life and is unaware of the opportunities to reduce reuse and recycle waste. 3) When new models of mobile phones appear on the market, many citizens are more prone to buy the new ones, rather than keeping the old ones, no matter whether the old ones are still usable. 4) Only by doing so can we ensure that we can have an optimal win-win solution beneficial to environment and production.

A、1)

B、2)

C、3)

D、4)

To complete Assignment 1, you must complete the following tasks. A. Provide concise responses to each of the following tasks. The relevant section of the textbook by Weaver and Lawton is given in each task. You will also find relevant information in the Required Readings Part 1 document. 1. According to Weaver and Lawton (p. 26), how do stayovers differ from excursionists? 2. According to Weaver and Lawton (pp. 35-36), what role do transit regions play in the tourism system? B. Provide concise responses to each of the following tasks. The relevant section of Cohen’s article is given in each task. You will find a summary of Cohen’s article in Required Readings Part 1. 3. According to Cohen’s conceptual definition of ‘tourist’ (1974, pp. 531-532, 536-537), what is the essential difference between a tourist and a refugee? How does a holiday-house owner differ from a tourist, according to Cohen’s conceptual definition (1974, pp. 532 and 540)? 4. Give an example from Cohen to show how he distinguishes between instrumental purpose and non-instrumental purpose (p. 532 and 540-544). What does he mean when he writes that the purpose of tourism is ‘socially defined’ (p. 541)? C. Provide concise responses to each of the following tasks. The relevant sections of Smith’s article and Leiper’s article are given in each relevant task. You will find a summary of the articles by Smith and Leiper in Required Readings Part 1. 5. Why did Smith describe tourism as a retail service industry (1988, p. 183)? According to Smith how do ‘pure tourism services’ differ from ‘mixed tourism services’ (1988, p. 184)?

Choose one question from 1-3 and one from 4-6 and give brief answers in English: Henry?James What?is?the?most?famous?theme?in?Henry?James’s?fiction? Henry?James’s “The?Art?of?Fiction”?is?an?indispensable?part?of?his contribution?to?literature.?Please summarize his?view?in?literary?criticism?? What is the difference between realism and psychological realism? Mark Twain In the The Adventures of Huckleberry Finn, Huck Finn is a thirteen-year-old boy. Why does Mark Twain use a child as the center of consciousness in this book? What are the contributions Mark Twain made to American literature? What is colloquialism and how is it shown in Mark Twain’s works?