国产精品尤物福利片在线观看_少妇免费毛片久久久久久久久_久久久久成人精品免费播放动漫_日韩av综合在线观看

歡迎來到010在線作文網!

習題四級新題型+聽力及答案

試題 時間:2021-08-31 手機版

  大學英語四級考試試點考試樣卷 (試題冊)

  如果在線收聽不暢,請點擊下載

  PartⅠ Writing(30 minutes) Directions: For this part, you are allowed 30 minutes to write a campaign speech in support of your election to the post of chairman of the student union. You should write at least 120 words following the outline given below in Chinese:

  1. 你認為自己具備了什么條件(能力、性格、愛好等)可以勝任學生會主席的工作

  2. 如果當選,你將為本校同學做些什么

  Part Ⅱ Reading Comprehension (Skimming and Scanning) (15 minutes)

  Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1.

  For questions 1-7, mark

  Y (for YES) if the statement agrees with the information given in the passage;

  N (for NO) if the statement contradicts the information given in the passage;

  NG (for NOT GIVEN) if the information is not given in the passage.

  For questions 8-10, complete the sentences with the information given in the passage.

  Landfills

  You have just finished your meal at a fast food restaurant and you throw your uneaten food, food wrappers, drink cups, utensils and napkins into the trash can. You don't think about that waste again. On trash pickup day in your neighborhood, you push your can out to the curb, and workers dump the contents into a big truck and haul it away. You don't have to think about that waste again, either. But maybe you have wondered, as you watch the trash truck pull away, just where that garbage ends up.

  Americans generate trash at an Astonishing rate of four pounds per day per person; which translates to 600,000 tons per day or 210 million tons per year! This is almost twice as much trash per person as most other major countries. What happens to this trash? Some gets recycled (回收利用) or recovered and some is burned, but the majority is buried in landfills.

  How Much Trash Is Generated?

  Of the 210 million tons of trash, or solid waste, generated in the United States annually, about 56 million tons, or 27 percent, is either recycled (glass, paper products, plastic, metals) or composted (做成堆肥) (yard waste). The remaining trash, which is mostly unrecyclable, is discarded.

  How Is Trash Disposed of ?

  The trash production in the United States has almost tripled since 1960. This trash is handled in various ways. About 27 percent of the trash is recycled or composted, 16 percent is burned and 57 percent is buried in landfills. The amount of trash buried in landfills has doubled since 1960. The United States ranks somewhere in the middle of the major countries (United Kingdom, Canada, Germany, France and Japan) in landfill disposal. The United Kingdom ranks highest, burying about 90 percent of its solid waste in landfills.

  What Is a Landfill?

  There are two ways to bury trash:

  n Dump-an open hole in the ground where trash is buried and that is full of various animals (rats, mice, birds). (This is most people's idea of a landfill!)

  n Landfill-carefully designed structure built into or on top of the ground in which trash is isolated from the surrounding environment (groundwater, air, rain). This isolation is accomplished with a bottom liner and daily covering of soil.

  ¨ Sanitary landfill-land fill that uses a clay liner to isolate the trash from the environment

  ¨ Municipal solid waste (MSW) landfill-landfill that uses a synthetic (plastic) liner to isolate the trash from the environment

  The purpose of a landfill is to bury the trash in such a way that it will be isolated from groundwater, will be kept dry and will not be in contact with air. Under these conditions, trash will not decompose (腐爛) much. A landfill is not like a compost pile, where the purpose is to bury trash in such a way that it will decompose quickly.

  Proposing the Landfill

  For a landfill to be built, the operators have to make sure that they follow certain steps. In most parts of the world, there are regulations that govern where a landfill can be placed and how it can operate. The whole process begins with someone proposing the landfill.

  In the United States, taking care of trash and building landfills are local government responsibilities. Before a city or other authority can build a landfill, an environment impact

  study must be done on the proposed site to determine:

  n the area of land necessary for the landfill

  n the composition of the underlying soil and bedrock

  n the flow of surface water over the site

  n the impact of the proposed landfill on the local environment and wildlife

  n the historical value of the proposed site

  Building the Landfill

  Once the environmental impact study is complete, the permits are granted and the funds have been raised, then construction begins. First, access roads to the landfill site must be built if they do not already exist. There roads will be used by construction equipment, sanitation (環衛) services and the general public. After roads have been built, digging can begin. In the North Wake Country Landfill, the landfill began 10 feet below the road surface.

  What Happens to Trash in a Landfill?

  Trash put in a landfill will stay there for a very long time. Inside a landfill, there is little oxygen and little moisture. Under these conditions, trash does not break down very rapidly. In fact, when old landfills have been dug up or sampled, 40-year-old newspapers have been found with easily readable print. Landfills are not designed to break down trash, merely to bury it. When a landfill closes, the site, especially the groundwater, must be monitored and maintained for up to 30 years!

  How Is a Landfill Operated?

  A landfill, such as the North Wake County Landfill, must be open and available every day. Customers are typically municipalities and construction companies, although residents may also use the landfill.

  Near the entrance of the landfill is a recycling center where residents can drop off recyclable materials (aluminum cans, glass bottles, newspapers and paper products). This helps to reduce the amount of material in the landfill. Some of these materials are banned from landfills by law because they can be recycled.

  As customers enter the site, their trucks are weighed at the scale house. Customers are charged tipping fees for using the site. The tipping fees vary from $10 to $40 per ton. These fees are used to pay for operation costs. The North Wake County Landfill has an operating budget of approximately $4.5 million, and part of that comes from tipping fees.


本文來源http://www.nvnqwx.com/shiti/869606.htm
以上內容來自互聯網,請自行判斷內容的正確性。若本站收錄的信息無意侵犯了貴司版權,請給我們來信(zaixianzuowenhezi@gmail.com),我們會及時處理和回復,謝謝.
国产精品尤物福利片在线观看_少妇免费毛片久久久久久久久_久久久久成人精品免费播放动漫_日韩av综合在线观看
国产日韩欧美综合| 国产精品露脸自拍| 欧美最猛性xxxxx(亚洲精品)| 午夜精品久久久久久久白皮肤| 欧美乱人伦中文字幕在线| 国产精品久久久久久久久借妻| 国产精品青青草| 久久综合色88| 一本久久a久久精品vr综合| 亚洲wwwav| 日本999视频| 欧美视频在线观看网站| 国内精品视频在线| 成人免费观看毛片| 91精品啪aⅴ在线观看国产| 69精品丰满人妻无码视频a片| 国产精品96久久久久久| 国产成人jvid在线播放| 精品国模在线视频| 国产精品久久久久久久久久| 欧美成人精品三级在线观看| 亚洲一区 在线播放| 日本一区二区三不卡| 欧美亚洲国产成人精品| 国产午夜精品视频一区二区三区| 99视频免费观看蜜桃视频| 国产成人精品久久二区二区 | 69av视频在线播放| 久久久久久久久久久国产| 久久成人av网站| 亚洲xxxx视频| 欧美日韩系列| 国产伦精品一区二区三区精品视频| 97福利一区二区| 国产成人午夜视频网址| 中文字幕中文字幕一区三区| 品久久久久久久久久96高清| 国产情侣av自拍| 国产高清视频一区三区| 国产精品福利片| 午夜欧美一区二区三区免费观看| 日本阿v视频在线观看| 国产午夜福利在线播放 | 日韩在线观看高清| 美女精品视频一区| 日日橹狠狠爱欧美超碰| 国内精品免费午夜毛片| 91av国产在线| 国产精品第一区| 全黄性性激高免费视频| www国产亚洲精品| 国产精品入口日韩视频大尺度| 亚洲一区三区视频在线观看| 欧美国产亚洲一区| 国产成人亚洲综合青青| 中文字幕免费高| 免费国产一区| 国产成人精品一区二区| 午夜免费久久久久| 国产一区二区丝袜| 国产成人三级视频| 手机看片福利永久国产日韩| 国产精品最新在线观看| 国产精品欧美激情在线观看| 日韩区国产区| 国产成人一区二区| 亚洲黄色网址在线观看| 国产亚洲情侣一区二区无| 国产精品手机在线| 热久久免费国产视频| 久久综合色一本| 亚洲人成无码www久久久| 国产欧美123| 久久成人在线视频| 国内精品久久久| 久久精品在线视频| 奇米一区二区三区四区久久| 久久视频免费在线| 亚洲精品高清国产一线久久| www.九色.com| 亚洲欧洲精品一区| 91国产一区在线| 午夜精品久久久久久久99黑人 | 国产精品九九久久久久久久| 欧美中文字幕第一页| 久久久久久久久久国产| 日韩精品极品视频在线观看免费| 国产成人一区二区三区小说| 亚洲在线视频观看| 97久久精品视频| 亚洲mm色国产网站| 久久人人看视频| 日韩欧美电影一区二区| 俺去啦;欧美日韩| 欧美日韩免费高清| 国产精品丝袜久久久久久不卡| 欧美精品一区二区三区免费播放| 久久精品视频中文字幕| 黄色成人在线免费观看| 欧美久久精品一级黑人c片| 国产伦精品一区二区三区四区免费 | 蜜臀久久99精品久久久酒店新书| 精品久久国产精品| 激情伦成人综合小说| 国产精品久久97| 国产欧美一区二区三区久久| 伊人久久大香线蕉午夜av| 91久久久久久久| 热久久精品国产| 国产精品日韩欧美综合| 欧美高清视频一区 | 日韩精品在线中文字幕| 久久精品成人动漫| 国产一区二区精品免费| 亚洲一区二区久久久久久| 久久99精品久久久久久水蜜桃| 欧美日韩一区二区三区电影| 精品久久久久av| 99国产视频在线| 欧美一级二级三级| 九色成人免费视频| 久久久亚洲福利精品午夜| 日本免费成人网| 国产精品久久网| 91久久偷偷做嫩草影院| 青青草精品视频在线| 欧美精品一二区| 91久久综合亚洲鲁鲁五月天| 欧美最大成人综合网| 精品国产免费久久久久久尖叫| 91九色在线免费视频| 欧美一级大片在线观看| 中文字幕欧美日韩一区二区三区| 国产高清精品一区| 国产日韩视频在线观看| 日日噜噜噜夜夜爽爽| 国产精品美女久久久久av超清| 国产精品伊人日日| 青青草原av在线播放| 一区二区国产日产| 久久精品国产清自在天天线| 成人精品视频在线播放| 欧美日韩激情四射| 亚洲a中文字幕| 欧美精品在线第一页| 久艹在线免费观看| 成人做爽爽免费视频| 激情伊人五月天| 日本精品二区| 亚洲一区中文字幕在线观看| 国产精品久久久久久av下载红粉| 久久久7777| 成人在线免费观看一区| 欧美凹凸一区二区三区视频| 肉大捧一出免费观看网站在线播放 | 日本午夜精品电影| 伊人久久在线观看| 国产精品美女www爽爽爽视频| 国产高清精品在线观看| 国产精品一区=区| 免费在线观看亚洲视频| 欧美一级视频免费在线观看| 中文精品一区二区三区| 国产精品久久久久久久久久久久久久 | 99久久99| 国产剧情久久久久久| 国模杨依粉嫩蝴蝶150p| 欧美自拍大量在线观看| 日韩一区不卡| 亚洲精品tv久久久久久久久| 伊人久久99| 在线观看成人av| 在线观看免费91| 永久久久久久| 亚洲综合视频1区| 亚洲一区影院| 一本二本三本亚洲码| 欧美日韩国产第一页| 久久中文字幕在线| 久久福利网址导航| 久久亚洲综合国产精品99麻豆精品福利 | 国产高清不卡无码视频| 久久在线中文字幕| 91久久国产婷婷一区二区| 97碰在线观看| 97久久国产亚洲精品超碰热| 成人3d动漫一区二区三区| 高清一区二区三区日本久| 国产免费一区二区三区视频| 国产一区二区视频免费在线观看| 黄色免费观看视频网站| 蜜桃91精品入口| 国产午夜伦鲁鲁| 国产一区二区高清不卡| 国产精品自拍合集| 成人中文字幕在线播放| 91精品久久久久久久| 久久人人97超碰精品888| 国产成人亚洲欧美| 国产精品无码专区在线观看|