单选题Perhaps the most popular film in movie history, Star Wars was written and direction by George Lucas.

单选题Which of the following can be inferred from the passage about how citizens of Seattle received the Olmsted Report?

单选题Human Migration Human migration: the term is vague. What people usually think of is the permanent movement of people from one home to another. More broadly, though, migration means all the ways—from the seasonal drift of agricultural workers within a country to the relocation of refugees from one country to another. Migration is big, dangerous, and compelling. It is 60 million Europeans leaving home from the 16th to the 20th century. It is some 15 million Hindus, Sikhs, and Muslims swept up in a tumultuous shuffle of citizens between India and Pakistan after the partition of the subcontinent in 1947. Migration is the dynamic undertow of population change: everyone's solution, everyone's conflict. As the century turns, migration, with its inevitable economic and political turmoil, has been called "one of the greatest challenges of the coming century". But it is much more than that. It is, as has always been, the great adventure of human life. Migration helped create humans, drove us to conquer the planet, shaped our societies, and promises to reshape them again. "You have a history book written in your genes," said Spencer Wells. The book he's trying to read goes back to long before even the first word was written, and it is a story of migration. Wells, a blond geneticist at Stanford University, spent the summer of 1998 exploring remote parts of Transcaucasia and Central Asia with three colleagues in a Land Rover, looking for drops of blood. In the blood, donated by the people he met, he will search for the story that genetic markers can tell of the long paths human life has taken across the Earth.(A) [■] But however the paths are traced, the basic story is simple: people have been moving since they were people.(B) [■] If early humans hadn't moved and intermingled as much as they did, they probably would have continued to evolve into different species.(C) [■] From beginnings in Africa, most researchers agree, groups of hunter-gatherers spread out, driven to the ends of the Earth.(D) [■] To demographer Kingsley Davis, two things made migration happen. First, human beings, with their tools and language, could adapt to different conditions without having to wait for evolution to make them suitable for a new niche. Second, as populations grew, cultures began to differ, and inequalities developed between groups. The first factor gave us the keys to the door of any room on the planet; the other gave us reasons to use them. Over the centuries, as agriculture spread across the planet, people moved toward places where metal was found and worked to centers of commerce that then became cities. Those places were, in turn, invaded and overrun by people in later generations called barbarians. In between, these storm surges were steadier but similarly profound tides in which people moved out to colonize or were captured and brought in as slaves. For a while the population of Athens, that city of legendary enlightenment was as much as 35 percent slaves. "What strikes me is how important migration is as a cause and effect in great world events. " Mark Miller, co-author of The Age of Migration and a professor of political science at the University of Delaware, told me recently. It is difficult to think of any great events that did not involve migration. Religions spawned pilgrims or settlers; wars drove refugees before them and made new land available for the conquerors; political upheavals displaced thousands or millions; economic innovations drew workers and entrepreneurs like magnets; environmental disasters like famine or disease pushed their bedraggled survivors anywhere they could replant hope. "It's part of our nature, this movement," Miller said, "It's just a fact of the human condition. "

单选题Also (known) as a movie (or) a film, the motion picture is one of the most popular (form) of art and entertainment (throughout) the world.

单选题According to the passage, agricultural societies produced larger human populations because agriculture

单选题Barium is a soft, heavy, silvery white metallic element that readily reacts with another elements to form useful compounds.

单选题Like triglycerides, cholesterol is a type of fat that is both consumed in the diet but manufactured by the body.

单选题A computer is a fast electronic machine------information according to a stored sequence of instructions called a program.

单选题Listening4"StudentsonCampus"

单选题The (large) collection of the Williams College Museum of Art (includes) ancient and medieval art ,but (much) exhibits are (modern)or contemporary.

单选题All the planets in the Solar system except Mercury and Venus have natural satellites, — objects that revolve around the planets.

单选题The membrane surrounding {{/U}}a single-celled animal or plant or any individual cellin a multicellular organism is important in the respiratory and nutritionally {{/U}}processes of that cell.

单选题Summer Break Student A: Hi, Wendy. Student B: Hi, Sven. Student A: Only two more weeks of classes, eight school days actually, then exams start. Student B: Yes, I will be glad when ______. I ______ and very stressed at exam time. I find myself eating constantly and I don"t seem to find any time to exercise. Student A: Exams don"t bother me that much. This year most of the marks for my courses were ______ and research projects. I only have two exams. Student B: You are lucky. I have five. I also need to get good marks, over 80 percent, or I ______ keep my scholarship. Student A: What are you doing for summer break? Student B: I would like to ______ at a restaurant in Florence. My uncle owns a restaurant ______ and he has offered me a job for the summer. In Italy, there are ______, so he would like to have someone ______. It would also be an excellent opportunity for me to practice my Italian. I hope to be a translator one day, so I need to be ______. Student A: That would be a wonderful summer. Student B: Yes, I know. I really want to go. The problem is my father ______ three weeks ago. He is out of the hospital now and not in too much danger, but he ______ the house. My brother is ______, so I am the only one to help my mother around the house. It is such a dilemma. I don"t know what to do. Student A: Yes, I could see that would be a very difficult decision. You are only young once, though, and a chance to go to Florence for the summer, ______. Student B: I am ______ going to Italy, but I just feel so guilty. What about you, Sven? What are your plans for the summer? Student A: Well, I have a dilemma, too. I would love to go to Nepal and ______ that could use me to ______ in engineering skills. It would be a chance to share what I already know and I think it would be really interesting to spend four months in Nepal. However, I don"t find out until next week whether or not I ______ the program. If I do get accepted, I won"t be making any money and I need money to return to university for my final year in September. Student B: If you don"t go to Nepal, where would you work? Student A: I don"t know. I have had some interviews with some construction companies. There are a lot of ______ on the south side of the city. There were three companies that thought they would have a place for me to ______ and the pay is good. None of the three companies are unionized, but they all ______. I would ______ where I could use the engineering skills I have already acquired. I have applied to several companies for inside work, but ______ and neither seemed very promising. It would look much better ______ after I graduate, if I have work experience in my field. Also, many engineering students get hired after they graduate by the company they worked for the previous summer. Student B: I can see your problem. If you get the opportunity to go to Nepal, I would probably go. Can"t you borrow money ______ for your final year? Student A: Probably, but I hate to start off ______. Engineering fees are rising by 10 percent next year. It is not ______. Student B: No, but if you have the opportunity to go to an interesting job in Nepal, and ______, I think that would be wonderful. Student A: You are probably right. I appreciate your advice.

单选题Some subsistence activities such as hunting large animals or netting fish require — to work together.

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单选题Listen to Track 69. A. Very few students are asked to consider writing an honors thesis. B. The woman has shown poor research skills in the past. C. An honors thesis could help the woman get into law school. D. The woman should write a proposal outlining her research skills.

单选题Listentopartofaconversationbetweentwostudents.Nowgetreadytoanswerthequestions.Youmayuseyournotestohelpyouanswer,

单选题.In the late 1970’s and early 1980’s, the United States developed the reusable space shuttle ________to space cheaper and easier.

单选题The word "estimated" in line 11 is closest in meaning to

单选题The population of California (more than) doubled (during the. period 1940-1960, creating problems in road-building and (provide. water for its arid (southern section). A. more than B. during the C. provide D. southern section