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简述信用证与买卖合同的关系。
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阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 Stinking (发臭的) Buses Stinking buses jam(挤满) the crowded street. Drivers (51) at one another and honk(鸣喇叭)their horns. Smog(烟雾)hurts the eyes and chokes(窒息) the senses. The (52) is Athens at rush hour. The city is in a sorry state of affairs, built (53) a plan, lacking even adequate sewerage facilities (排水设施) ,its 135 square miles packed with 3.7 million people. So great has been the population flow toward the city that neighboring villages stand (54) or nearly so. About 120,000 people from distant provinces move to Athens every year. The migrants come for the few available (55) . Because of migration, Athens by the year 2000 will have a population of 6.5 million, more than half the nation. Aside from overcrowding and poor public transport, the biggest (56) facing Athenians are noise and pollution. A government study (57) that Athens was the noisiest city in the world. Smog is almost at killing levels: up to four times the level that the World Health Organization considers safe. Nearly half the pollution comes from cars. (58) high prices for vehicles and fuel, nearly 100,000 automobiles are sold in Greece each year: 3,000 drivers’ licenses are (59) in Athens monthly. After decades of neglect, Athens is at (60) getting some attention. In March a government meeting was held to discuss a plan to make the city (61) and clean up its environment. A save-Athens ministry will propose heavy taxes to (62) immigration and a minimum of ＄5 billion in public spending for Athens alone. A master plan that will move many government offices to the city’s (63) is already in the works. Meanwhile, more Greeks (64) moving into Athens. With few parks and few oxygen-producing plants, the city and its citizens are (65) suffocating(窒息).
第二篇 TV Goes Digital Coming soon to your TV: views of the hottest live basketball plays from any seat in the stadium. What a better look at that three-point shot Call for a replay from behind the basket. Or better yet, follow the "view" of the ball as it goes through the net. While watching, you might use a built-in speakerphone to talk with a fan in the stands. Or send the score via email to your father in Japan. Sounds impossible It won’t be when the computerized television industries combine to create digital TV machines that receive, send, store, and manipulate TV programs the way computers now manipulate other data; Industry and government representatives recently reached an agreement on how this technology will take place. New digital TVs that allow current TVs to receive digital signals may hit stores by next spring. To understand how the digital revolution will change the way you watch TV it helps to know how TVs work now. Today, TV networks such as CBS and Fox broadcast; TV shows as analogue electrical signals; These signals travel via the airwaves, satellites; or cable as a continuous stream of electromagnetic energy (like light and radio waves). But this system leaves a lot of room for error. The main problem is that interference can change the voltage of the signal as it travels. This may result in a distorted or miscolored picture. If we send out the signal in a form that is nearly free from interference-binary(两位数的)code, pictures and colors are not distorted. you’ll need to buy a new TV to receive these signals. And the new sets may cost 1,000 US dollars more than today’s TVs. But they’ll come with other benefits that may make the price worthwhile. For one thing, the screens will be wider, like movie screens. In addition, the color will be richer. And you’ll also get digital CD-quality sound. Besides these benefits, digital TVs can offer you a much wider choice of programs. Digital data can expand TV choices because computers can compress digital signals. Broadcasters will be able to send six times as much information on the same "channel". What is the author’s opinion about the new TV
简述跟单托收的定义及其种类。
阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。 Health Education1．Health education is the part of health care that is concerned with promoting healthy behavior. A person’s behavior may be the main cause of a health problem, but it can also be the main solution. This is true for the teenager who smokes, the mother with the poorly nourished (营养)child, and the butcher (屠夫,卖肉的人)who gets a cut on his finger, By changing their beha～vior these individuals can solve and prevent many of their own problems.2．Health education does not replace other health services, but it is needed to promote the proper use of these services. One example of this is immunization (免疫) :scientists have made many vaccines (疫苗) to prevent diseases, but this achievement is of no value unless people to go receive the immunization.3．Health education encourages behavior that promotes health, prevents illness, cures disease, and contributes to recovery. The needs and interests of individuals, families, groups, organizations, and communities are at the heart of health education programs. Thus there are many opportunities for practicing health education.4．Health education is not the same thing as health information. Correct information is certainly a basic part of health education, but health education must also address the other factors that affect health behavior such as availability (可获性) of resouces, effectiveness of community leadership, social support from family members, and levels of self-help skills. Health education therefore uses a variety of methods to help people understand their own situations and choose actions that will improve their health. Health education is incomplete unless it encourages involvement and choice by the people themselves.5．Also, in health education we do not blame people if they do not behave in a healthy way. Often unhealthy behavior is not the fault of the individual. In health education we must work with families, communities, and even regional and national authorities to make sure that resources and support are available to enable each individual to lead a healthy life. Health education cannot take the place of ______.
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