网络工程是一项复杂的系统工程，一般可分为网络规划、网络设计、工程实施、系统测试验收和运行维护等几个阶段。网络规划是在需求...

Underground Coal Fires -- a Looming CatastropheCoal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large-scale underground blazes cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can even ignite forest fires, a panel of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting release of poisonous elements like arsenic and mercury can also pollute local water sources and soils, they warned."Coal fires are a global catastrophe," said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, USA. But surprisingly few people know about them.Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to disappear and under the right combinations of sunlight and oxygen, can trigger spontaneous catching fire and burning. This can occur underground, in coal stockpiles, abandoned mines or even as coal is transported. Such fires in China consume up to 200 million tones of coal per year, delegates were told. In comparison, the U.S. economy consumes about one billion tones of coal annually, said Stracher, whose analysis of the likely impact of coal fires has been accepted for publication in the International Journal of Coal Ecology. Once underway, coal fires can bum for decades, even centuries. In the process, they release large volumes of greenhouse gases, poisonous fumes and black particles into the atmosphere.The members of the panel discussed the impact these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to detect. One of the members of the panel, Assistant Professor Paul Van Dijk of the International Institute for Geo-Information Science and Earth Observation in the Netherlands, has been working with the Chinese government to detect and monitor fires in the northern regions of the country.Ultimately, the remote sensing and other techniques should allow scientists to estimate how much carbon dioxide these fires are emitting. One suggested method of containing the fires was presented by Gary Colaizzi, of the engineering firm Goodson, which has developed a heat-resistant grout (a thin mortar used to fill cracks and crevices), which is designed to be pumped into the coal fire to cut off the oxygen supply. Which of the following statements about Paul Van Dijk is NOT tree()

A. He was one of the scientists who have warned against the threats of underground fires.
B. He has detected and monitored underground fires in the Netherlands.
C. He has worked with the Chinese government on the underground fires issue.
D. He works for a research institute in the Netherlands.

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简单邮件传送协议SMTP，用于发送电子邮件，SMTP默认的TCP端口为( )。

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Interior Design A. some B. any C. this D. each

Although interior design has existed since the beginning of architecture, its development into a specialized field is really quite recent. Interior designers have become important partly because of the many functions that might be (51) in a single large building.
B. The importance of interior design becomes (52) when we realize how much time we (53) surrounded by four walls. Whenever we need to be indoors, we want our surroundings to be (54) attractive and comfortable as possible. We also expect (55) place to be appropriate to its use.
C. You would be (56) if the inside of your bedroom were suddenly changed to look (57) the inside of a restaurant. And you wouldn’t feel (58) in a business office that has the appearance of a school.
D. It soon becomes clear that the interior designer’s most important basic (59) is the function of the particular (60) , for example, a theatre with poor sight lines, poor sound shaping qualities, and (61) few entries and exists will not work for (62) purposes, no matter how beautifully it might be (63) . Nevertheless, for any kind of space, the designer has to make many of the same kind of (64) . He or she must coordinate the shapes, lighting and decoration of everything from ceilling to floor, (65) addition, the designer must usually select furniture or design built-in furniture, according to the functions that need to be served.

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Interior Design A. like B. for C. at D. into

Although interior design has existed since the beginning of architecture, its development into a specialized field is really quite recent. Interior designers have become important partly because of the many functions that might be (51) in a single large building.
B. The importance of interior design becomes (52) when we realize how much time we (53) surrounded by four walls. Whenever we need to be indoors, we want our surroundings to be (54) attractive and comfortable as possible. We also expect (55) place to be appropriate to its use.
C. You would be (56) if the inside of your bedroom were suddenly changed to look (57) the inside of a restaurant. And you wouldn’t feel (58) in a business office that has the appearance of a school.
D. It soon becomes clear that the interior designer’s most important basic (59) is the function of the particular (60) , for example, a theatre with poor sight lines, poor sound shaping qualities, and (61) few entries and exists will not work for (62) purposes, no matter how beautifully it might be (63) . Nevertheless, for any kind of space, the designer has to make many of the same kind of (64) . He or she must coordinate the shapes, lighting and decoration of everything from ceilling to floor, (65) addition, the designer must usually select furniture or design built-in furniture, according to the functions that need to be served.

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