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Leaf peeping the practice of traveling to watch nature display the fall colors,is a beloved annual activity,especially in New England.Typically,by the end of September,leaves take on warmer colors throughout the U.SBut this year,many areas haven't even shaken off the green shades of summer.In Maine,forest rangers reportedless than 70%color change and modest leaf drop.It's commonly believed that trees,like people,must prepare for winter.When fall arrives,and day length andtemperature drop,trees respond by ending green substance production and absorbing remaining nutrients,causingleaves to lose the original color.Greens give way to yellows,reds and oranges that make for dramatic autumndisplays.Warm fall temperatures can make the fall colors appear later.Worse,dry summers can cause leaves to missthe fall color turn altogether.Delay of the start of the fall colors,which has been moving later into the fall,couldcontinue."My observations in the last decade have had more years that were later than what we consider historicalaverages.It can be a trend as the planet warms,"said the expert Jim Salge.It's not just the plants that suffer."Turning leaves offer an irresistible mass of color-which,by estimate,brings in as much as billions of dollars a year in tourism in New England,"said Andy Finton,a forest ecologist.That's another good reason to focus on preserving forests.Leaf peeping can stay part of the area's feature if forestsare given enough protection."If we can keep them unharmed,they'll provide things we've depended on,as well asfall inspiration,"said Finton.8.What is special about the leaves in Maine this year?A.They take on warm colors.B.They drop earlier than normal.C.They stay green longer.D.They totally miss the fall color turn.9.What is paragraph 2 mainly about?A.Ways of trees surviving winter.B.Explanation of leaves changing color.C.Functions of the green substance.D.Effect of climate change on fall leaves.10.What is the "trend"according to Jim Salge in paragraph 3?A.The earth gets drier.B.The temperature gets higher.C.The earth gets warmer.D.The leaves delay color change.11.What's the purpose of this text?A.To introduce leaf peeping.B.To report the right time for leaf peeping.C.To call on people to admire fall leaves.D.To warn people to take care of forests.【答案】8.C9.B10.D11.D【解析】【导语】本文是一篇说明文。秋日赏叶是一项备受人们喜爱的活动，但是由于气候变化的影响，美国很多地区的树叶在秋季依然保持着绿色，这给树木本身和经济带来了不利的影响。【8题详解】细节理解题。根据第一段“Typically,by the end of September,leaves take on warmer colors throughout the U.S,But this year,many areas haven't even shaken off the green shades of summer.In Maine,forest rangers reportedless than70%color change and modest leaf drop.(通常，到9月底，美国各地的树叶都会呈现出暖色调。但今年，许多地区甚至还没有摆脱夏天的绿色阴影。在缅因州，护林员报告说只有不到70%的颜色变化和少量的落叶)”可知，今年缅因州的树叶保持绿色的时间较长。故选C。【9题详解】主旨大意题。根据第二段“It's commonly believed that trees,like people,must prepare for winter..When fallarrives,and day length and temperature drop,trees respond by ending green substance production and absorbingremaining nutrients,causing leaves to lose the original color.Greens give way to yellows,reds and oranges thatmake for dramatic autumn displays..(人们普遍认为树和人一样，必须为冬天做准备。当秋天到来，白天长度和温度下降时，树木的反应是停止产生绿色物质，吸收剩余的营养物质，导致树叶失去原来的颜色。绿色让位于黄色、红色和橙色，它们构成了引人注目的秋季展示)”可知，第二段主要讲树叶颜色变化的原因。故选B。【10题详解】词句猜测题。根据第三段中“Delay of the start of the fall colors,which has been moving later into the fall,.couldcontinue."My observations in the last decade have had more years that were later than what we consider historicalaverages..It can be a trend as the planet warms,.”said the expert Jim Salge.(秋色开始推迟的时间可能会继续。秋色开始的时间一直推迟到秋天。“我在过去十年的观察中发现，比我们认为的历史平均水平晚的年份更多。随着地球变暖，这可能成为一种趋势，”专家Jim Salge说)”可知，秋天树叶开始变色的时间延迟了，要进入秋天一段时间才变色，这一趋势将延续。在过去的十年中，有超过一半的年份树叶变色的时间晚于历史平均时间。这是受全球变暖影响而出现的一种趋势。故“trnd”意指“树叶变色延迟”。故选D【11题详解】推理判断题。根据最后一段中“Leaf peeping can stay part of the area's feature if forests are given enoughprotection."If we can keep them unharmed,they'll provide things we've depended on,as well as fall inspiration,"said Finton.(如果森林得到足够的保护，赏枫叶可以成为该地区的特色之一。Finton说：“如果我们能让它们毫发无损，它们将提供我们赖以生存的东西，以及秋天的灵感。”)”结合本文讲述的是，美国很多地区的树叶在秋季依然保持着绿色，给树木本身和经济带来了不利的影响。文章探讨了这一现象的原因，即气候变化导致树叶变色延迟。由此可知，作者的写作目的在于引发读者对这一问题的关注，呼吁人们应对气候变化，保护森林。故选D。

17.答案：①人大代表是国家权力机关的组成人员，代表人民参加行使国家权力，应当时刻以人民为中心，才能真正做到民有所呼，我有所应。(2分)②人大代表是人民利益的代言人，他们来自人民，肩负人民的重托，应与人民群众保持密切联系，通过多种方式听取群众的意见和要求，推进民主权利的实现，切实做到民有所呼，我有所应。(4分)③人大代表依法享有提案权、审议权和表决权。人大代表要在广泛调研的基础上提交议案，并积极审议、表决相关提案，切实解决群众关心的问题，做到民有所呼，我有所应。(4分)