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瑞士风光优美,被誉为“世界公园”,是著名的长寿区。瑞士境内森林广布,覆盖率为全国面积的32.4%,瑞士每年采伐森林数量大大低于森林的增长速度,国内需求的不足部分则依靠进口来补充。高大的阿尔卑斯山横贯中南部,境内河湖众多,日内瓦湖为冰川作用形成,罗讷河流至此处积水成湖,因此有人说“罗讷河促成了日内瓦湖”,但是也有人说“罗纳河却又在不断消灭它”,左图为瑞士及附件区域略图,右图为瑞士首都伯尔尼的气温和降水资料图。读图完成下列问题。 

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Tips for Cycle Trips

       Cycling has many advantages as a form of travel, as it is the fastest way to travel by human power and slow enough to allow the type of local involvement that is impossible with powered travel.Cycle travel is a cheap form of transportation.

       Distance

      On level terrain(地形),without a headwind, a cyclist of average fitness on a touring bike can comfortably cover 60­120km a day.Distances of up to 250km a day are possible, but anything much beyond 120km will require considerable physical tension and not allow many stops to enjoy the places you visit.For many,80­100km a day will be the most suitable distance to aim for, as it will give a sense of achievement and also leave plenty of time for meals and activities.

       Geography

       The gradient(坡度)of the trip will reduce your range.A basic rule is that for every 100 meters of altitude you climb, you should add an extra 15 minutes to your journey time.In hilly or mountainous areas, the easiest routes for cycling are downstream along major rivers, as overall they will be downhill.A long, roundabout route along a river will usually be easier than a short, direct route over a hill or mountain pass.However, it is worth bearing in mind that the most scenic routes often come from hilly terrain.

      Eat

      Food choice depends largely on where you are, so see the respective sections for more information about foods. As you will be working hard, it's important to get enough energy in your food. On long trips away from major towns­there may be little quality food available, so be prepared to live on candy bars, prepared meat products and the like if the need arises.

      Sleep

      While you can take a tent with you, many hotels and especially campsites can accommodate cyclists. However, there are also some hotels that may be less used to accommodating cyclists. If you are exploring an unfamiliar world asking about the accommodation spares you the search for a new place to stay after a long exhausting day of travel.