2. 外语
  3. Last December, visitors arriving in Vail, Colo., ready to kick off the winter ski season, immediately noticed something missing:

Last December, visitors arriving in Vail, Colo., ready to kick off the winter ski season, immediately noticed something missing:

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问题    Last December, visitors arriving in Vail, Colo., ready to kick off the winter ski season, immediately noticed something missing: the snow. The town was lush and green; only Vail Pass, at 10, 617 ft. above sea level, was dusted in the champagne powder Colorado is known for.
   Climate change has had a direct and aggressive effect on winter tourism — and not just in Vail. In 2016-17, the first frost came two weeks later than the 20th century average, according to data from the National Oceanic and Atmospheric Administration (NOAA), and the last one nine days earlier. The season was nearly a month shorter than expected, a trend that’s been worsening since the 1980s. NOAA’s outlook for winter 2018-19 predicts warmer, drier and milder conditions across the US.
   Those working in ski towns and at resorts do not need meteorologists to tell them that; they can see the effects in their business. "Last year, we had radically less snow — our lowest snow year in 50 years, " says Auden Schendler, the Senior Vice President of Sustainability at Aspen Skiing Company in Aspen, Colo. "In low-snow years, you see about a billion dollars less in revenue." Those years also cost ski regions 17, 400 jobs, according to the 2018 economic report from Protect Our Winters, a nonprofit environmental organization.
   It’s not just that there’s less snow; it’s that snow patterns are so unpredictable, ski towns, resorts and businesses can’t count on conditions necessary for financial stability. To be considered "snow reliable, " a ski area must have more than 30 cm of snow depth (natural and man-made) during 100 days or during the entire Christmas through New Year’s holiday period in at least seven out of 10 years. By those standards, all of the northeastern states (except Vermont) are projected to lose at least half of their ski areas, according to a review in the journal Current Issues in Tourism. And if climate change continues apace, 90% of ski resorts in the U.S. won’t be able to open by Christmas by 2090.
   European ski areas have similar problems. By 2099, the Alps could lose up to 70% of their snow cover, according to research published by the European Geosciences Union — and just two to three weeks of operating at a loss could tank a ski area’s financial season.
   In North America, multi-resort ski passes like the Epic Pass and Ikon Pass can help somewhat. "People can book last-minute trips to the resort with the best snow, " says Schendler. "But obviously, last-minute bookings make it harder to plan-for marketing, for occupancy and for projected revenue." Ironically, too much snow can also impact ski resorts. If a massive storm hits, as has happened more frequently, if unpredictably, in recent years, the sudden heavy snowfall can raise the threat of avalanches, leading resorts to shut down runs or even keep patrons indoors.
   Fluctuating snow patterns haven’t completely derailed ski tourism yet. In fact, tourism numbers have remained static for two decades, Schendler says. But scientists and industry veterans feel like they can see a dark future. "At the current rate of warming, the ski industry is probably done by midcentury, " Schendler says. "We’re not acting like we are in crisis, but we are."
We can NOT learn from Paragraph 4 that______.
选项 A、the snow became less and unpredictable
B、the standards which defines what is a "snow reliable ski area"
C、all of the northeastern states have lost at least half of their ski areas
D、90% of the ski resorts in the US won’t be able to open by the end of this century
答案C
解析 第4段中提到“By those standards，all of the northeastern states(except Vermont)are projected to lose at least half of their ski areas”，中文意思是“据推断，东北各州，除Vermont州之外，会失去至少一半的可滑雪的地区”。而C项表示“所有州”，与此不符，答案为C。
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