All this means that agriculture in the 21st century will have to be very different from how it was in the 20th.this will require radical thinking.for example,we need to move away from the idea that traditional practices are inevitably more sustainable than new ones.we also need to abandon the notion that agriculture can be “zero impact”. The key will be to abandon the rather simple and static measures of sustainability,which centre on the need to maintain production without increasing damage.instead we need a more dynamic interpretation,one that looks at the pros and cons of all the various way land is used.there are many different ways to measure agricultural performance besides food yield:energy use, environmental costs,water purity,carbon footprint and biodiversity. It is clear, for example,that the carbon of transporting tomatoes from spain to the UK
Is less than that of producing them in the UK with additional heating and lighting.but we do not know whether lower carbon footprints will always be better for biodiversity.
What is crucial is recognizing that sustainable agriculture is not just about sustainable food production.
52. How do people ofen measure progress in agriculture?
A.By its productivity C.By its impact on the environmet
B.By its sustainability D.By its contribution to economic growth
53. Specialisation and the effort to incease yields have esulted in________.
A.Localised pollution C.competition from overseas
B.the shrinking of farmland D.the decrease of biodiversity
54.What does the author think of traditional farming practices?
A.They have remained the same over the centuries
B.They have not kept pace with population growth
C.They are not necessarily sustainable
D.They are environmentally friendly
55.What will agriculture be like in the 21st century
A.It will go through radical changes
B.It will supply more animal products
C.It will abandon traditional farming practices
D.It will cause zero damage to the environment
56 What is the author’s purpose in writing this passage?
A.To remind people of the need of sustainable development
B.To suggest ways of ensuring sustainable food production
C.To adance new criteria for measuring farming progress
D.To urge people to rethink what sustainable agriculture is
Passage Two
Questions 57 to 61 are based on the following passage
The percentage of immigrants(including those unlawfully present) in the United states has been creeping upward for years. At 12.6 percent, it is now higher than at any point ince the mid1920s
We are not about to go back to the days when Congress openly worried about inferior races polluing America’s bloodstream. But once again we are wondering whether we have too many of the wrong sort fo necomers.Their loudest citecs argue that the new wave of immigrants cannot,and indeed do not want to, fit in as previous generations did.
We now know that these racist views were wrong.In time, Italians, Romanians and members of other so-called inferior races became exemplary Americans and contributed greatly, in ways too numerous to detail , to the building of this magnificent nation. There is no reason why these new immigrants should not have the same success.
Although children of Mexican immigrants do better, in terms of educational and professional attainment, than thir parents UCLA sociologist Edward Telles has found that the gains don’t continme. Indeed, the fouth generation is marginally worse off than the third James Jackson,of the University of Michigan,has foud a simila rend among black Caribbean immigrants,Tells fears that Mexican-Americans may be fated to follow in the footsteps of American blacks-that largeparts of the community may become mired in a seemingly state of poverty and Underachievement . Like African-Americans, Mexican-americans are increasingly relegated to (降入)segregated, substandyrd schools, and their dropout rate is the highest for any 儿童会nic group in the country.
We have learned much about the foolish idea of excluding people on the presumption of the ethnic/racial inferiority. But what we have not yet learned is how to make the process of Americanization work for all. I am not talking about requiring people to learn English or to adopt American ways; those things happen pretty much on their own, but as arguments about immigration hear up the campaign trail, we also ought to ask some broader question about assimilation, about ho wto ensure that people , once outsiders , don’t fovever remain marginalized within these shores.
That is a much larger question than what should happen with undocumented workers, or how best to secure the border, and it is one that affects not only newcomers but groups that have been here for generations. It will have more impact on our future than where we decide to set the admissions bar for the lasest ware of would-be Americans. And it would be nice if we finally got the answer right.
57.How were immigrants viewed by U.S. Congress in early days?
A.They were of inferior races.
B.They were a Source of political corruption.
C.They were a threat to the nation’s security.
D.They were part of the nation’s bloodstream.
58.What does the author think of the new immigrants?
A.They will be a dynamic work force in the U.S.
B.They can do just as well as their predecessors.
C.They will be very disappointed on the new land.
D.They may find it hard to fit into the mainstream.
59.What does Edward Telles’ research say about Mexican-Americans?
A.They may slowlu improve from generation to generation.
B.They will do better in terms of deucationl attainment.
C.They will melt into the African-American community.
D.They may forever remain poor and underachieving.
60.What should be done to help the new immigrants?
A.Rid them of their inferiority complex.
B.Urge them to adopt American customs.www.Examda.CoM考试就到考试大
C.prevent them from being marginalized.
D.Teach them standard American English.
61.According to the author,the burning issue concerning immigrationg is_______.
A.how to deal with people entering the U.S. without documents
B.how to help immigrants to better fit into American society
C.how to stop illegal immigrants from crossing the corder
D.how to limit the number of immigrants to enter the U.S.
Part V
Individuals and businesses have legal protection for intellectual property they create and own . intellectual proper _62_from creative thinking and may include products, 63 processes, and ideas. Intellectual property is protected 64 misapproprition(盗用)Misappropriation is taking the Intellectual propetty of others withour ____65____ compensation and using it for monetary gain.
Legal protection is provided for the ___66___of intellectual propetty. The three common types of legal protection are patents, copyrights, and trademarks.
Patents provide exclusive use of inventions. If the u.s patent office __67__ a patent, it is confirmind that the intellectual property is ___68____. The patent prevents others from making ,using, or selling the invention without the owner’s __69___ for a period of 20 years.
Copyright are similar to patents __70___that they are applied to artistic works. A copyright protects the creator of an __72___artisitic or intellectual work, such as a song or a novel. A copyright gives the owner wxclusive rights to copy, __72___ display, or perform the work . the copyright prevents others from using and selling the work , the __73___ of a copyright is typically the lifetime of the author 74 an additional 70 years. Trademarks are words, names, or symbols that Identify the manufacturer of a product and 75 it from similar goods of others. A servicemark is similar to a trademark 76 is used to identify services. A trademark prevents others from using the 77 or a similar word, name, or symbol to take advantage of the recognition and 78 of the brand or to create confusion in the marketplace.79 registration, a trademark is usually granted for a period of ten years. It can be 80 for additional ten-year periods indefinitely as 81 as the mark’s use continues.
62A.retrieves
B.deviates
C.results
D.departs
63A.services
B.reservers
C.assumptions
D.motions
64
A.for
B.with
C.by
D.from
65
A.sound
B.partial
C.due
D.random
66
A.users
B.owners
C.masters
D.executives
67
A.affords
B.affiliates
C.funds
D.grants
68
A.solemn
B.sober
C.unique
D.universal
69
A.perspective
B.permission
C.conformity
D.consensus
70
A.except
B.besides
C.eyond
D.despite