《大学英语四级考试全真预测试卷一.pdf》由会员分享，可在线阅读，更多相关《大学英语四级考试全真预测试卷一.pdf（36页珍藏版）》请在金锄头文库上搜索。
1、大学英语四级考试全真预测试卷一 资料仅供参考 6 月大学英语四级考试全真预测试卷一Model Test One Part I Writing 30 minutes Directions For this part you are allowed 30 minutes to write a composition one topic City Problems You should write at least 120 words following the outline given below in Chinese 1 越来越多的人涌入大城市 有些问题随之产生 2 比较明显的大问题有 3 我
2、对这种现象的想法 City Problems 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
3、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 Scientists Weigh Options for Rebuilding New Orleans 资料仅供参考 As experts
4、 ponder how best to rebuild the devastated 毁坏 city one question is whether to wall off or work with the water Even before the death toll from Hurricane Katrina is tallied scientists are cautiously beginning to discuss the future of New Orleans Few seem to doubt that this vital heart of U S commerce
5、and culture will be restored but exactly how to rebuild the city and its defenses to avoid a repeat catastrophe is an open question Plans for improving its levees and restoring the barrier of wetlands around New Orleans have been on the table since 1998 but federal dollars needed to implement them n
6、ever arrived After the tragedy that s bound to change says John Day an ecologist at Louisiana State University LSU in Baton Rouge And if there is an upside to the disaster he says it s that now we ve got a clean slate to start from Many are looking for guidance to the Netherlands a country that just
7、 like bowl shaped New Orleans sits mostly below sea level keeping the water at bay with a construction of amazing scale and complexity Others pointing to Venice s long standing adaptations say it s best to let water flow through the city depositing sediment to offset geologic subsidence a model that
8、 would require a radical rethinking of architecture Another idea is to let nature help by restoring the wetland buffers between sea and city But before the options can be weighed several unknowns will have to be addressed One is precisely how the current defenses failed To answer that LSU coastal sc
9、ientists Paul Kemp and Hassan Mashriqui are picking their way through the destroyed city and surrounding region reconstructing the size of water surges by measuring telltale marks left on the sides of buildings 资料仅供参考 and highway structures They are feeding these data into a simulation of the wind a
10、nd water around New Orleans during its ordeal We can t say for sure until this job is done says Day but the emerging picture is exactly what we ve predicted for years Namely several canals including the MRGO which was built to speed shipping in the 1960s have the combined effect of funneling surges
11、from the Gulf of Mexico right to the city s eastern levees and the lake system to the north Those surges are to blame for the flooding One of the first things we ll see done is the complete backfilling of the MRGO canal predicts Day which could take a couple of years The levees which have been provi
12、sionally repaired will be shored up further in the months to come although their long term fate is unclear Better levees would probably have prevented most of the flooding in the city center To provide further protection a mobile dam system much like a storm surge barrier in the Netherlands could be
13、 used to close off the mouth of Lake Pontchartrain But most experts agree that these are short term fixes The basic problem for New Orleans and the Louisiana coastline is that the entire Mississippi River delta is subsiding and eroding plunging the city deeper below sea level and removing a thick cu
14、shion of wetlands that once buffered the coastline from wind and waves Part of the subsidence is geologic and unavoidable but the rest stems from the levees that have hemmed in the Mississippi all the way to its mouth for nearly a century to prevent floods and facilitate shipping As a result river s
15、ediment is no longer spread across the delta but dumped into the Gulf of Mexico Without a constant stream of fresh sediment the barrier islands and marshes are disappearing rapidly with a quarter roughly the size of Rhode Island already gone 资料仅供参考 After years of political wrangling a broad group pu
16、lled together by the Louisiana government in 1998 proposed a massive 14 billion plan to save the Louisiana coasts called Coast 2050 now modified into a plan called the Louisiana Coastal Area project Wetland restoration was a key component It s one of the best and cheapest hurricane defenses says Day who chaired its scientific advisory committee Although the plan was never given more than token funding a team led by Day has been conducting a pilot study since diverting part of the Mississippi int
