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1、2022-2023年江苏省苏州市大学英语6级大学英语六级知识点汇总（含答案）学校:_ 班级:_ 姓名:_ 考号:_一、2.Reading Comprehension (Skimming and Scanning)(20题)1.The program aimed at creating a single, federated sign-on system is called _.2.The reason why the ersatz news that Alabama changed the value of Pi spread wildly was that _ forwarded the a
2、rticle to friends and posted it on other newsgroups.3.U.S. PopulationPresent Situations of U.S. PopulationThe U.S.the most populous of todays developed countriesbas one of the highest population growth rates of the industrialized nations: about one percent annually. This adds some 2.5 million people
3、 every yearequivalent to a new city the size of San Diegowhich is by far the largest numerical increase of any developed country. By the end of 1994, the U.S. population had climbed to 262 million, up from 203 million in 1970. The change stands in sharp contrast with Europe which today adds less tha
4、n a million people per year to a population of about 728 million and Japans addition of 0.3 million to a total of 125 million.Immigration now contributes roughly a third of the annual U.S. increase, although natural increase, or births minus deaths, remains substantial at about 1.7 million per year.
5、 This is in part the consequence of a younger age distribution resulting from the post-war baby boom (1946-1964), but U.S. fertility (生育力) has also been among the highest of the industrialized countries. The U.S. TFR ( the total fertility rate, defined as the average number of children women will be
6、ar in their lifetime) remained at about 1.8 from the mid-1970s to the latter 1980s, when it began rising to 2.1 in 1991. The U.S. TFR has since receded slightly, dropping to about 2.0 in 1993.The relatively high U.S. fertility is one of this countrys most striking demographic (人口统计学的) features. Shou
7、ld the present rate persist, the country would remain at or near the replacement level to avoid population decline as in Europe. Although fertility levels do vary among ethnic groups, the TFR for U.S. non-Hispanic white women in 1992 was nonetheless 1.8; for blacks, it was 2.4; Asian and Pacific Isl
8、anders, 1.9; American Indians, 2.2; and Hispanics 3.0.National TrendsThe U.S. population is undergoing at least two major shifts: a significant change in its geographic distribution and a similarly important change in ethnic composition. Immigration accounting for a third of the present annual growt
9、his also an undeniable factor. The stream of immigrants into the U.S. is highly directed towards but six of the 50 states (California, with 261,000 legal immigrants in 1993; New York 151,000; Texas 67,000; Florida 61,000; New Jersey 50,000; and Illinois 47,000). Within these, moreover, the flow is c
10、oncentrated within but a few metropolitan areas.Shifts in Geographic DistributionThe balance of population is shifting rapidly to the South and West. The Northeast and Midwest have experienced a continuous loss of population to the South and West by migration from other areas of the U.S. These two s
11、un-belt regions have also received a higher influx of immigrants.From 1990 to 1993, the Northeast and Midwest experienced a net loss of 367,000 residents through migration to other parts of the country while gaining 260,000 immigrants from abroad. The South gained 471,000 migrants from the balance o
12、f the U.S. and another 180,000 from outside the country. The West actually lost population because of migration to other regions, because of the numerical dominance of the state of California in the region. It is likely that the loss of jobs in California in defense-related employment was responsibl
13、e for this unexpected mm of events. The South and West received no fewer than 500,000 net immigrants from abroad, just over half of which were to California alone.Changes in Ethnic CompositionOne-fourth of the present population of the U.S. is now composed of racial minorities, which are defined as
14、anyone who is not white and non-Hispanic. In the next 50 years that fraction will grow to nearly half the total, according to recent projections. The Hispanic population is projected (预测) by the Census Bureau to rise from 22.5 million in 1990 to just under 90 million by 2050, due to the combination
15、of immigrationA.Y B.N C.NG4.A U.S. scientific report concluded that some trends of climate change were caused by _5.During the preparing procedure, one important part is to help the candidates understand the possible outcomes and _.6.The two major shifts the U.S. population is undergoing are changes
16、 in geographic distribution and in_.7.Today, the term FedEx a package has long been recognized to mean _.8.FBI criminal data includes DNA samples collected from the convicted as well as the accused.A.Y B.N C.NG9.Why did Viacom demand YouTube remove clips from its website?A.Because YouTube violated the agreement of Viacom.B.
