In both North America and South America, business people are more inclined to trust t

A.A.To give best wishes for the coming Christmas and New Year.

B.B.To ask for the introduction of some business partners in North Americ

C.C.To consolidate the business relationship.

A.China has more railways than Americ

B.America has two neighbour countries, Canada and Mexico.

C.Both America and China's climates vary greatly.

D.America's land is less than China's, but water in America is more than Chin

that lead them to believe that humans first migrated to the New World not 11,500 years ago, but much earlier – 20,000 or even 50,000 years ago.(翻译)

A.New Hampshire

B.A Boy's Will

C.North of Boston

D.A Further Range

材料：

The tug Vegesack was towing a barge engaged in“stone-fishing”in the vicinity of the Beach End buoy in Harwich Channel．Tug and tow were part of a dredging programme．During the dredging contract，the practice was for the dredging craft，Vegesack，to nominate the passing side for vessels．

The barge was difficult to control in tidal and traffic conditions，and the master needed to exercise considerable skill and anticipation，as well as having to liaise closely with VTS and passing vessels．The German master had been issued with a pilotage exemption certificate and had been operating in the channel for nearly two months before the incident．

The ferry Dana Anglia was outbound from Harwich in daylight and GOOD visibility．When she was close to North Shelf buoy，VTS called Vegesack and agreed that Vegesack，who was in the middle of the channel，would move to the north side．This would enable both Dana Anglia and Bencomo，an inbound vessel currently passing No5 buoy，to pass to the south．VTS gave this passing information to the two vessels．

While passing Platters buoy，Bencomo called Vegesack，requesting her to move to the north．Vegesack said she was going to move to the Harwich（or south）side，and instructed Bencomo to pass to the north．VTS then intervened and confirmed with Vegesack that she wanted both vessels to pass to the north．At this time，Dana Anglia was approaching North West Beach buoy and could see Vegesack heading south，in contravention to what she had been asked to do and had agreed.

Vegesack then started turning to the north．Dana Anglia sounded her whistle and put her engines to full astern．Vegesack then passed close down the starboard side of Dana Anglia.

问题：

Vegesack and her tow ________．

A.were laying stones into the channel to make the navigation more safer

B.were fishing in the channel

C.were passing vessels in the channel

D.were dredging in the channel by picking-up stones

The situation was that ________．A.both Dana Anglia and Bencomo were inbound

B.both Dana Anglia and Bencomo were outbound

C.Dana Anglia was outbound，Bencomo，inbound

D.Dana Anglia was inbound，Bencomo，outbound

It is the ________ that has，in accordance with the practice，the right to determine which side to pass for both inbound and outbound vessels．A.Dana Anglia

B.Bencomo

C.VTS

D.Vegesack

The lesson from this accident is that ________．A.clarity of language is everything at sea

B.Dana Anglia should proceed in the middle of the channel

C.Vegesack should be away from any inbound and outbound vessel

D.it is not necessary for VTS to intervene with the communication between vessels in heavy traffic area

请帮忙给出每个问题的正确答案和分析，谢谢！

Questions are based on the following passage．

Most of us are used to seasons． Each year, spring follows winter, which follows autumn, which follows summer, which follows spring． And winter is colder than summer． But the earth goes through temperature cycles over much longer perio~ds than those that we experience． Between 65,000 and 35,000 years ago, the planet was much colder than it is now． During that time the temperature also changed a lot, with periods of warming and cooling． Ice melted duringthe warm periods, which made sea levels rise． Water froze again during the cold periods．

(77) A new study from Switzerland sheds light on where ice sheets melted during the ice age． It now seems that the ice melted at both ends of the earth, rather than just in either northemor southern regions．

age． It now seems that the ice melted at both ends of the earth, rather than just in either northern

or southern regions．

This surprised the researchers from the University of Bern． (78) Scientists have long assumed that most of the ice that melted was in the Northern hemisphere (半球) during the 30,000-year long ice age． That belief was held because the North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean． It is easier for ice sheets to grow on land． If surrounded by sea the ice can easily just slip into the ocean instead of building up．

The researchers used a computer model to look at ways the ice could melt and how it might affect sea levels． They compared these results to evidence of how temperatures and currents actually changed during that time． The model showed that if it was only in the Northern hemisphere that ice melted, there would have been a bigger impact (影响）on ocean currents (洋流) and sea temperatures than what actually happened． Studies suggest that melting just in the Southern hemisphere would have been impossible, too． The only reasonable conclusion, the scientists could make, was that ice melted equally in the North and the South．

It is still a mystery as to what caused the temperature changes that caused the ice to melt．

The North Pole is surrounded by land， while the South Pole is surrounded by the Antarctic Ocean． So scientists thought that __________ 查看材料

A.most of the ice melted in the Northern hemisphere

B.most of the ice melted in the Southern hemisphere

C.The North Pole is colder than the South Pole

D.The South Pole is colder than the North Pole

能性边界不同：挪威由于有较长的沿大西洋的海岸线，因此捕鱼效率高;瑞典的资本相对充裕，故而汽车的生产效率高。据此，根据标准贸易模型论述这两国的贸易利益。

Assume that Norway and Sweden trade with each other， with Norway exporting fish to Sweden， and Sweden exporting Volvos (automobiles) to Norway. Illustrate the gains from trade between the two countries using the standard trade model， assuming first that tastes for the goods are the same in both countries， but the production possibilities frontiers differ: Norway has a long coast that borders on the north Atlantic， making it relatively more productive in fishing. Sweden has a greater endowment of capital， making it relatively more productive in automobiles.

The wide variety of climates in North America has helped spawn a complex pattern of

soil regions. In general, the realm's soils also reflect the broad environmental partitioning

into "humid America" and "arid America." Where annual precipitation exceeds 20 inches

(50 centimeters),soils in humid areas tend to be acidic in chemical content, Since crops

(5) do best in soils that ale neither acidic(higher in acid content) nor alkaline(higher in salt

content).fertilization is necessary to achieve the desired level of neutrality between the

two. Arid America's soils are typically alkaline and must be fertilized back toward

neutrality by adding acidic compounds. Although many of these dryland soils, particularly

in the Great Plains, are quite fertile, European settlers learned over a century ago that

(10) water is the main missing ingredient in achieving their agricultural potential. In the

1970's, certain irrigation methods were perfected and finally provided a real opportunity

to expand more intensive farming west from the Central Lowland into the drier portions

of the Great Plains. Glaciation also enhanced the rich legacy of fertile soils in the central

United States, both from the deposition of mineral-rich glacial debris left by meltwater

(15) and from thick layers of fine wind-blown glacial material, called loess, in and around the

middle Mississippi Valley.

Natural vegetation patterns could be displayed on a map of North America, but the

enormous human modification of the North American environment in modem times has

all but reduced this regionalization scheme to the level of the hypothetical. Nonetheless,

(20) the humid America-arid America dichotomy is still a valid generalization: the natural

vegetation of areas receiving more than 20 inches of water yearly is forest, whereas the

drier climates give rise to a grassland cover. The forests of North America tent to make

a broad transition by latitude. In the Canadian North, needle-leaf forests dominate, but

these coniferous trees become mixed with broadleaf deciduous trees as one crosses the

(25) border into the Northeast United States As one proceeds toward the Southeast, broadleaf vegetation

becomes dominant. Arid America mostly consists of short-grass prairies or

stepper. The only areas of true desert are in the Southwest.

What aspect of North America does the passage mainly discuss？

A．The wide variety of climates

B．Soil types and vegetation patterns

C．Improved irrigation methods and the expansion of agriculture

D．The change in precipitation patterns

A.Fast food is not the invention of American peopl

B.Drive-through windows allow people to order and eat food right in their cars.

C.McDonald’s was the first fast food restaurant set up in Americ

D.White Castle is a hamburger joint that opened in 1916.

ample, one advantage 22 the education in Japan is that students there learn much more math and science 23 American students. They also study more hours each day than Americans 24 . The study is difficult, but it 25 students for a society that values discipline (纪律) and self-control. There is, however, a disadvantage. Memorization is an important learning method in Japanese schools, 26 many students say that after an exam, they forget much of the information that they have memorized.

The advantage to the education in North America, 27 the other hand, is that students learn to think by themselves. The system prepares them for a society that values 28 ideas. There is, however, a disadvantage. When students graduate from high school, they haven't memorized 29 many basic rules and facts as students in other countries 30 .

21.

A. not only

B. all

C. both

D. only