题目内容
听力原文： All three bombs exploded within half an hour of each other outside a police station south of the city centre. A national newspaper received an anonymous phone call warning about the attack just minutes before the first device exploded in the early hours of the morning. A fourth device was found by the bomb squad and destroyed in a controlled explosion. The whole area has been cordoned off and the anti-terrorism unit of the police has begun an investigation. So far, the police have not said what kind of bombs were used in the attack and no one has admitted responsibility. But suspicion is bound to fall on radical left-wing organizations which have carried out simdilar attacks in the past.
Which of the following is irrelevant to the cause of the explosions？
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听力原文： This week in our Foreign Student Series: the cost of higher education in the United States. Students who want to attend an American college or university must explain how they will pay for their education. They have to show that they will be able to pay for each year of study. Students have to consider not only the tuition, the cost of classes, but also meals and a place to live, known as room-and-board. They also need money for books and supplies. And they need money to spend for social activities and other things.
A leading state university in the Pacific Northwest will serve as our example. The University of Washing- ton says foreign students are paying more than thirty-six thousand dollars this year. Its Website says the University of Washington does not offer financial assistance to international students. This is generally true of American schools, especially at the undergraduate level.
The international application for the university includes a Statement of Financial Responsibility that must be signed. Students must also provide a bank letter or statement from within the past six months. And they have to name anyone who will help with payments. These people must send proof from a bank to show that they have the money.
What is the speaker talking about？
Who proposed a national mourning？
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： The Internet is a global web of computers connected to each other by wires, cables, satellites, radio waves, and waves of light. If you look at a map of big cities, smaller towns, and scattered houses, each is connected by roads, railways, rivers and other things. This is similar to the Internet.
The "big cities" of the Internet are the server computers of Yahoo, Tripod, AOL, and other networks. They often have search engines, e-mail services, shopping, entertainment, and other services that draw mil- lions of people from all around the world just like the post offices, stores, movie theaters, and other places do in the communities where we live.
Other computers on the Internet are also part of these online towns. Local banks often provide access to account information with their computers. Businesses like Wal-Mart, Lowes, and many others have computers that provide online stores where people can purchase different items. Many colleges and universities offer on- line classes that allow people to get their degrees on the Internet. Yon can often pay your cable bill, credit card payment, electric bill and other payments online. You can even buy groceries online at places like NetGrocer. You can do just about anything online that you can offline.
The speaker compares the Internet to______.
The nuclear energy is released at the Sun's center as high - energy gamma radiation, a form. of electro- magnetic radiation like light and radio waves only of very much shorter wavelength. This gamma radiation is absorbed by atoms inside the Sun, to be reemitted at slightly longer wavelengths. This radiation, in its turn, is absorbed and reemitted. At the energy filters through the layers of the solar interior, it passes through the X- ray part of the spectrum, eventually becoming light. At this stage, it has reached what we call the solar surface, and can escape into space, without being absorbed Farther by solar atoms. A very small fraction of the Sun's light and heat is emitted in such directions that, after passing unhindered through interplanetary space, it hits the Earth.
A simple magnifying glass, focusing the Sun's rays, can scoarch, a piece of wood or set a scrap of paper on fire. Solar radiation can also be concentrated on a much larger scale. It can burn a hole through thick steel plate, for example, or simulate the thermal shock of a nuclear blast. It can, that is, with the help of a super reflector of the sort that has been set up by French scientists high in the Pyroness. The world’s largest solar furnace is a complex of nearly 20,000 mirrors. It can concentrate enough sunlight to create’temperatures in excess of 6000 degrees Fahrenheit.
The furnace's appearance is as spectacular as its power. Its glittering eight - story - high reflector towers over very old houses. Anchored against a concrete office and laboratory building, the huge reflector consists of nearly 9000 separate mirrors. For the furnace to operate, these small mirrors must be adjusted so that their light will meet exactly at a focal point 59 feet in front of the giant reflector.
What does the passage mainly discuss？
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