問題詳情

Sit down in an airport main concourse today and you’ll catch a glimpse of what makes the modern world tick. Ona personal level, families reunite and adventures begin amid the swirl of our rapidly globalizing world. As fortechnology, one witnesses a marvel here as we conquer the skies.Denver International Airport (DIA), one of the largest (it covers 54 square miles) and fifth busiest airport in USA(in 2013, 25.5 million people passed under its unique tented roof), was the first U.S. airport to develop acomprehensive plan to manage environmental impact and the first to meet national and international sustainabilitystandards.DIA marked another first when it earned membership in the Environmental Protection Agency’s PerformanceTrack for excelling in protecting human health and the environment. Meanwhile, the Colorado Department of PublicHealth has recognized DIA for 10 years running as a Colorado Environmental Gold Leader for voluntarily goingbeyond compliance with state and federal regulations and for its continual environmental improvement.Throughout these efforts and accolades, natural gas vehicles have been a key component of sustainability effortsat the airport. Using compressed natural gas (CNG) in DIA’s 221 natural gas vehicles saves more than $135,000 eachyear in fuel costs. Based on the savings and overall success, the airport plans to add 25 to 50 more natural gas vehiclessoon.“We continue to invest in initiatives that reduce our carbon footprint and are financially viable, which assurestheir perpetuity even in times of economic downturn,” said airport CEO Kim Day. “Natural gas is a key part of ourenergy portfolio, as it provides a lower-cost and more environmentally friendly solution for many of our operations.”Airport leaders recognize that DIA is not alone in a growing reliance on natural gas– other members of this littlecity, passengers, also may rely on the clean energy to power their vehicles. DIA provides public access for compressednatural gas fueling at rental car fueling stations.One gallon equivalent of natural gas is a little less than one-half the cost of one gallon of diesel fuel, so the costsavings are significant. CNG burns much cleaner than other fuels. CNG vehicles are better for the environment. Users’experience with CNG buses has been positive and they would certainly consider using more of CNG technology forfuture vehicles at the airport.
16 What does the “marvel” in Paragraph 1 refer to?
(A)A family reunion.
(B)The use of natural gas vehicles.
(C)A new airport concourse.
(D)The adventures made by travelers.

參考答案

答案：B
難度：適中0.46
統計：A(7),B(69),C(48),D(18),E(0)

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