单选题In Connecticut, (hundreds) of houses (dating from) the seventeenth and eighteenth centuries are preserved by more (as) 100 (local or national) historical societies.

单选题According to the passage, each nest has a distinct odor that allows its inhabitants to

单选题Tourism in Chile The biggest problem facing Chile, as it promotes itself as a tourist destination to be reckoned with, is that it is at the end of the earth. It is too far south to be a convenient stop on the way to anywhere else and it is considerably farther than a relatively cheap half-day's flight away from other major tourist markets, such as Mexico. Chile, therefore, is having to fight hard to attract tourists, to convince travelers that it is worth coming halfway round the world to visit. But it is succeeding, not only in existing markets like the USA and Western Europe but in new territories, in particular the Far East. Markets closer to home, however, are not being forgotten. More than 50% of visitors to Chile still come from its nearest neighbor, Argentina, where the cost of living is much higher. Similar to all the other South American countries, Chile sees tourism as a valuable earner of foreign currency, although it has been far more serious than most in promoting its image abroad. Relatively stable politically within the region, it has benefited from the problems suffered in other areas. In Peru, guerrilla warfare in recent years has dealt a heavy blow to the tourist industry and fear of street crime in Brazil has reduced the attraction of Rio de Janeiro as a dream destination for foreigners. More than 150000 people are directly involved in Chile's tourist sector, an industry which earns the country more than U.S. $ 950 million each year. The state-run National Tourism Service, in partnership with a number of private companies, is currently running a world-wide campaign, taking part in trade fairs and international events to attract visitors to Chile. Chile's great strength as a tourist destination is its geographical diversity. From the parched Atacama Desert in the north to the Antarctic snowfields of the south, it is more than 5000 km long. With the Pacific on one side and the Andean mountains on the other, Chile boasts natural attractions. Its beaches are not up to Caribbean standards but resorts such as Vinadel Mar are generally clean and unspoiled and have a high standard of services. But the trump card is the Andes mountain range. There are a number of excellent ski resorts within one hour's drive of the capital, Santiago, and the national parks in the south are home to rare animal and plant species. The parks already attract specialist visitors, including mountaineers, who come to climb the technically difficult peaks, and fishermen, lured by the salmon and trout in the region's rivers. However, infrastructural development in these areas is limited. The ski resorts do not have as many lifts as their European counterparts and part poor quality of roads in the south means that only the most determined travelers see the best of the national parks.(A) [■] Air links between Chile and the rest of the world are, at present, relatively poor.(B) [■] While Chile's two largest airlines have extensive networks within South America, they operate only a small number of routes to the U.S. and Europe while services to Asia are almost non-existent.(C) [■] Internal transport links are being improved and luxury hotels are being built in one of its national parks.(D) [■] Easter Island and Chiles Antarctic Territory are also on the list of areas where the government believes it can create tourist markets. But the rush to open hitherto inaccessible areas to mass tourism is not being welcomed by everyone. Indigenous and environmental groups, including Greenpeace, say that many parts of the Andes will suffer if they become over-developed. There is a genuine fear that areas of Chile will suffer the cultural destruction witnessed in Mexican and European resorts. The policy of opening up Antarctica to tourism is also politically sensitive. Chile already has permanent settlements on the ice and many people see the decision to allow tourists there as a political move, enhancing Santiago's territorial claim over part of Antarctica. The Chilean government has promised to respect the environment as it seeks to bring tourism potential. The government will have to monitor developments closely if it is genuinely concerned in creating a balanced, controlled industry and if the price of an increasingly lucrative tourist market is not going to mean the loss of many of Chile's natural riches.

单选题The fiction writer, (poetry), and critic Edgar Allan Poe is among the (most familiar) of American(writers) and (one of)the most enigmatic.

单选题The word "elicit" in line 18 is closest in meaning to

单选题The most important chemical catalyst on this planet is chlorophyll, ______carbon dioxide and water react to form carbohydrates. A. whose presence B. which is present C. presenting D. in the presence of which

单选题Among the most complexcrystals are that of silicon dioxide, which has seven different structures at various temperatures and pressures, the most common being quartz.

单选题The major purpose of the United States Department of Education are to ensure equal educational opportunity for all and to improve the quality of education.

单选题Birds usually (have very) well-developed sense of (sight), and the optic lobes of (their brains) are (correspondingly) large.

单选题___________ are chiefly derived from petroleum.

单选题1 A growing number of companies are finding that small-group discussions allow them to develop healthier ways to think about work. People at all levels of the corporate structure are starting groups that meet weekly or monthly to talk over ways to make workplaces more ethical and just. 2 Several factors must be present for small-group discussions to be successful. First, it is important to put together the right group. Groups work best when they consist of people who have similar duties, responsibilities, and missions. This does not mean, however, that everyone in the group must think in lockstep. 3 All participants should agree on the group's purpose. Finding the right subject matter is essential. There are several ways to fuel the discussion: by using the company's mission statement, by finding readings on work and ethics by experts in the topic, or by analyzing specific workplace incidents that have affected the company or others like it. 4 Finally, the dynamics of the group should be balanced, and the discussion leader must not be allowed to overwhelm the conversation or the agenda. Groups work best when the same person is not always in charge. It is better to rotate the leadership for each meeting and let that leader choose the material for discussion.

单选题Because (of the need) to maintain the correct balance of salts (and) minerals in the water, (keeping) saltwater fish in aquariums requires more work (that) keeping freshwater fish.

单选题Because they absorb heat from the environment rather than generate much of their own, reptiles are said to be ectotherms, a term identifying their major source of body heat as being external. Ectotherms heat directly with solar energy by basking in the sun, rather than through the metabolic breakdown of food, as in mammals and birds. This means that a reptile can survive on less than 10 percent of the calories required by a mammal of equivalent size. 2. Which sentence below best expresses the essential information in the highlighted sentence in the passage?

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单选题(Between) 1905 and 1907, (floodwaters) from the Colorado River poured into (a) salt-covered depression (and creating) the Salton Sea.

单选题What is the lecture mainly about? A. Research in pain management B. The benefits of exercise C. Why people have faith in doctors D. The chemistry of the human brain

单选题______that life began billions of years ago in the water. A. It is believed B. In the belief C. The belief D. Believing

单选题Amanda Way's career as a social reformer____ in 1851 when, at an antislavery meeting in Indiana, she called for a state woman's rights convention.

单选题The purpose of the "guncotton" mentioned in paragraph 2 was to (a) trap particles for analysis (b) slow the process of putrefaction (c) increase the airflow to the microscopic slide (d) aid the mixing of alcohol and ether