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期货合约的要素包括(    )。
Ⅰ.期货品种
Ⅱ.交易单位
Ⅲ.最小变动单位
Ⅳ.最后交易日

AⅠ、Ⅱ、Ⅲ

BⅠ、Ⅱ、Ⅳ

CⅠ、Ⅱ

DⅠ、Ⅱ、Ⅲ、Ⅳ

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style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/B) Despite the scale and visibility of such impacts, the total quantities of pollutants entering the sea from the long line of catastrophic oil spills appeared small compared with those of pollutants introduced directly and indirectly from other sources(including domestic sewage, industrial discharges, leakages from waste tips, urban and industrial ran-off, accidents, spillages, explosions, sea dumping operations, oil production, mining, agriculture nutrients and pesticides, waste heat sources, and radioactive discharges). Land based sources are estimated to account for around 44 percent of the pollutants entering the sea and atmospheric inputs account for an estimated 33 percent. By contrast, transport on the sea accounts for l2 percent. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/C) The impacts of pollution vary. Nutrient pollution from sewage discharges and agriculture can result in unsightly and possibly dangerous “blooms” of algae(藻类)in coastal waters. As these blooms die and decay they use up the oxygen in the water. This has led, in some areas, to “creeping dead zones” (CDZ), where oxygen dissolved in the water falls to levels unable to sustain marine life. Industrial pollution also contributes to these dead zones. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/Gone fission(裂变)
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/D) Radioactive(放射性的)pollution has many causes, including the normal operation of nuclear power stations, but by far the single biggest sources of man-made radioactive elements in the sea are the nuclear fuel reprocessing plants at La Hague in France and at Sellafield in the UK. Waste released from them has resulted in the widespread pollution of living marine resources over a wide area; radioactive elements traceable to reprocessing can be found in seaweeds as far away as the West Greenland Coast. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/E) Trace metal pollution from metal mining, production and processing industries can damage the health of marine plants and animals and render some seafoods unfit for human consumption. The contribution of human activities can be very significant:the amount of mercury introduced to the environment by industrial activities is around four times the amount released through natural processes such as weathering and erosion(腐蚀). The input of man-made chemicals to the oceans potentially involves an overwhelming number of different substances. 63, 000 different chemicals are thought to be in use worldwide with 3, 000 accounting for 90 percent of the total production amount. Each year, anywhere up to1,000 new synthetic chemicals may be brought onto the market. Of all these chemicals some 4,500 fall into the most serious category. These are known as persistent organic pollutants(POPs). They’re resistant to breakdown and have the potential to accumulate in the tissues of living organisms (all marine life), causing hormone disruption which can, in turn, cause reproductive problems, induce cancer, suppress the immune system and interfere with normal mental development in children. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/F) POPs can also be transported long distances in the atmosphere and deposited in cold regions. As a result, Inuit populations who live in the Arctic a long distance from the sources of these pollutants are among the most severely influenced people on the planet, since they rely on fat-rich marine food sources such as fish and seals. POPs are also thought to be responsible for some polar bear populations failing to reproduce normally. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/G) Scarily, seafoods consumed by people living in warm and mild regions are also affected by POPs. Oily fish tend to accumulate POPs in their bodies and these can be passed to human consumers. When oily fish are rendered down into fish meal and fish oils and subsequently used to feed other animals, then this too can act as a pathway to humans. Farmed fish and shellfish, dairy cattle, poultry and pigs are all fed fish meal in certain countries, and so meat and dairy products as well as fanned and wild fish can act as further sources of these chemicals to humans. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/H) The Noah and Baltic Seas also contain some of the world’s busiest shipping lanes. 200, 000 ships cross the North Sea every year. Many goods transported by ships are hazardous(half the goods carded at sea can be described as dangerous)and loss of dangerous cargoes can result in damage to the marine environment. Chemical tank washings, discharge of oily wastes and wash waters are all significant sources of marine pollution. In addition there is always the risk of a major oil spill, a risk made worse by the fact that some of the tankers that routinely travel through still have only one body-frame or have other technical defects and crews who are poorly educated. In November 2002, the Prestige oil tanker went down off the coast of Spain with70, 000 tons of oil on board which polluted 2,890 km of coastline. A few days earlier it had been crossing the Baltic. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/I) Some sources of pollution have been brought under control by international legislation. Countries which signed the London Convention have agreed to stop the dumping of radioactive and industrial waste at sea. The OSPAR Convention regulates marine pollution in the North East Atlantic Region while countries which signed the Stockholm Convention have committed themselves to the phase out of a number of persistent organic pollutants. Within the European Community, the Water Framework Directive may be expected to bring further reductions in polluting inputs, although it will be over a very long time frame. The additional benefit of the new EU REACH(Registration Evaluation and Authorisation of Chemicals) initiative, which aims to regulate the production and use of dangerous chemicals at source, remains to be seen.

1.[选词填空]Oil pollution is mentioned as the most visible and familiar marine pollution.

2.[选词填空]About one-third of the pollutants entering the sea come from atmospheric inputs.

3.[选词填空]The Inuit people depend on fat-rich marine life for food.

4.[选词填空]Hormone disruption in marine life is the result of accumulation of POPs.

5.[选词填空]4500 synthetic chemicals can be classified as POPs

6.[选词填空]The regulation of marine pollution in the North East Atlantic Region is based on the OSPAR Convention.

7.[选词填空]Marine life dies in creeping dead zones because of the lack of oxygen.

8.[选词填空]In warm and mild regions, farmed fish and shellfish are also affected by POPs because they are fed fish meal.

9.[选词填空]As long as 2890 km of coastline had been polluted by the oil spill of the Prestige oil tanker.

10.[选词填空]The West Greenland Coast has been polluted by radioactive elements.

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The traditions we associate with Christmas have evolved over the centuries. Here are answers to five questions about these traditions, from the date we choose to celebrate to the origin of Santa. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/A)The Bible makes no mention of Jesus being born on December 25th and, as more than one historian has pointed out, why would shepherds be tending to their flock in the middle of winter? So why is that the day we celebrate? Well, either Christian holidays miraculously fall on the same days as Pagan ones or the Christians have been crafty in converting pagan populations to religion by placing important Christian holidays on the same days as pagan ones. And people had been celebrating on December 25th(and the surrounding weeks)for centuries by the time Jesus showed up. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/B)The Winter Solstice, falling on or around December 21st, was and is celebrated around the world as the beginning of the end of winter. It is the shortest day and longest night and its passing signifies that spring is on the way. In Scandinavian countries, they celebrated the solstice with a holiday called Yule last from the 21st until January and burned a Yule log the whole time. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/C)In Rome, Saturnalia—a celebration of Saturn, the God of agriculture—lasted the entire end of the year and was marked by mass intoxication. In the middle of this, the Romans celebrated the birth of another God, Mithra(a child God), whose holiday celebrated the children of Rome. When the Christianity became the official religion of Rome, there was no Christmas. It was not until the 4th century that Pope Julius I declared the birth of Jesus to be a holiday and picked December 25th as the celebration day. By the middle ages, most people celebrated the holiday we know as Christmas. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/D)The American Christmas is, like most American holidays, a mishmash of Old World customs mixed with American inventions. While Christmas was celebrated in America from the time of the Jamestown settlement, our modem idea of the holiday didn’t take root until the 19th century. The History Channel credits Washington Irving with getting the ball rolling. In 1819 he published The Sketchbook of Geoffrey Crayon, gent. , an account of a Christmas celebration in which a rich family invites poor folk into their house to celebrate the holiday. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/E)The problem was that many of the activities described in Irving’s work, such as crowning a Lord of Misrule, were entirely fictional. Nonetheless, Irving began to steer Christmas celebrations away from drunken debauchery(放荡)and towards wholesome, charitable fun. Throughout the rest of the 19th century, Christmas gained popularity and Americans adopted old customs or invented new ones, such as Christmas trees, greeting cards, giving gifts and eating a whole roasted pig. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/F)Since time immortal, humans have been fascinated with the color green mid plants that stay green through winter. Many ancient societies—from Romans to Vikings—would decorate their Homes and temples with evergreens in the winter as a symbol of the returning growing season. But the Christmas tree didn’t get going until some intrepid(无畏的)German dragged home and decorated a tree in the l6th century. Legend has it that Martin Luther himself added lighted candles to his family’s tree, starting the trend(and leading to countless fires through the years). In America, the Christmas tree didn’t catch on until 1846 when the British royals, Queen Victoria and the German Prince Albert, were shown with a Christmas tree in a newspaper. Fashionable people in America mimicked the Royals and the tree thing spread outside of German enclaves(被围领土)in America. Ornaments, courtesy of Germany, and electric lights, courtesy of Thomas Edison’s assistants, were added over the years and we haven’t changed much since. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/G)The jolly, red-suited man who sneaks into your home every year to leave you girls hasn’t always been so jolly. The real Saint Nick was a Turkish monk who rived in the 3rd century. According to legend, he was a rich man thanks to an inheritance from his parents, but he gave it all away in the form of gifts to the less-fortunate. He eventually became the most popular saint in Europe and, through his alter ego, Santa Claus, remains so to this day. But how did a long-dead Turkish monk become a big, fat, reindeer-riding pole dweller? The Dutch got the ball rolling by celebrating the saint-called Sinter Klaas—in New York in the late-18th century. Our old friend, Washington Irving, included the legend of Saint Nick in his seminal History of New-York as well, but at the turn of the 18th century, Saint Nick was still a rather obscure figure in America. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/H)On December 23, 1823, though, a man named Clement Clarke Moore published a poem he had written for his daughters called “An Account of a Visit from St. Nicholas. ” better known now as “T’ was the Night Before Christmas. ” Nobody knows how much of the poem Moore invented, but we do know that it was the spark that eventually lit the Santa fire. Many of the things we associate with Santa—a sleigh, reindeer. Christmas Eve visits—came from Moore’s poem. From 1863 to1886, Thomas Nast’s illustrations of Santa Claus appeared in Harper’s Weekly—including a scene with Santa giving gifts to Union soldiers. Not much has changed since the second half of the 19th century:Santa still gets pulled in a sleigh by flying reindeer, he still wears the big red suit and he still sneaks down chimneys to drop off presents. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/I)Santa did get one more friend in 1939. Robert May, a copywriter for the Montgomery Ward department store chain, wrote a little story about a 9th reindeer with a disturbing red nose for a booklet to give customers during the holiday season. Ten years later, May’s brother would put the story to music, writing the lyrics and melody.

1.[选词填空]What Santa Claus does nowadays can be traced back to one of Clement Clarke Moore’s poems.

2.[选词填空]Rudolph, one of Santa Claus’ friends, appeared in Robert May’s story as a reindeer(with a disturbing red nose).

3.[选词填空]Christmas began to take root in America in the 19th century, thanks to the writer Washington Irving.

4.[选词填空]The trend of Christmas tree tradition in German Was said to be related to Martin Luther.

5.[选词填空]Drunken debauchery was regarded as old Christmas practice in America in the 19th century?

6.[选词填空]Winter Solstice means spring is coming when it comes around Dec. 21st.

7.[选词填空]The celebration of Jesus’ birth on Dec. 25th has much to do with Pope Julius I.

8.[选词填空]Santa Claus was based on a monk named Saint Nick who was from Turkey.

9.[选词填空]Color green fascinated the Vikings?

10.[选词填空]People began to celebrate Dec. 25th long before the birth of Jesus.

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style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/B)October 31st was the eve of the Celtic new year. The Celts were the ancestors of the present-day Irish, Welsh and Scottish people. On this day ghosts walked and mingled with the living, or so the Celts thought. The townspeople baked food all that day and when night fell they dressed up and tried to resemble the souls of the dead. Hoping that the ghosts would leave peacefully before midnight of the new year. Much later, when Christianity spread throughout Ireland and October 31st was no longer the last day of the year, Halloween became a celebration mostly for children. “Ghosts” went from door to door asking for treats, or else a trick would be played on the owners of the house. When millions of Irish people immigrated to the United States in the 1840s the tradition came with them. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/C)Today school dances and neighborhood parties called “block parties” are popular among young and old alike. More and more adults celebrate Halloween. They dress up like historical or political figures and go to masquerade parties(化装舞会). In larger cities, costumed children and their parents gather at shopping malls early in the evening. Stores and businesses give parties with games and treats for the children. Teenagers enjoy costume dances at their schools and the more outrageous the costume the better! Certain pranks(恶作剧)such as soaping car windows and tipping over garbage cans are expected. But partying and pranks are not the only things that Halloweeners enjoy doing. Some collect money to buy food and medicine for needy children around the world. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/D)Halloween originated as a celebration connected with evil spirits. Witches flying on broomsticks with black cats, ghosts, goblins(小精灵)and skeletons have all evolved as symbols of Halloween. They are popular trick-or-treat costumes and decorations for greeting cards and windows. Black is one of the traditional Halloween colors, probably because Halloween festivals and traditions took place at night. In the weeks before October31st, Americans decorate windows of houses and schools with silhouettes(轮廓)of witches and black cats. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/E)Pumpkins are also a symbol of Halloween. The pumpkin is an orange-colored squash. and orange has become the other traditional Halloween color. Carving pumpkins into jack-o'-lanterns is a Halloween custom also dating back to Ireland. A legend grew up about a man named Jack who was so stingy(吝啬的)that he was not allowed into heaven when he died, because he was a miser(吝啬鬼). He couldn’t enter hell either because he had played jokes on the devil. As a result, Jack had to walk the earth with his lantern until Judgement Day. The Irish people carved scary faces out of turnips(芜菁根), beets(甜菜根)or potatoes representing “Jack of the Lantern, ” or Jack-o'-lantern. When the Irish brought their customs to the United States, they carved faces on pumpkins because in the autumn they were more plentiful than turnips. Today jack-o'-lanterns in the windows of a house on Halloween night let costumed children know that there are goodie(糖果)waiting if they knock and say “Trick or Treat!”
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/F)After carving your pumpkin, separate the pulp from the seeds. Rinse the seeds and spread them out to dry. The next day, add enough melted butter or margarine(人造黄油)to coat each seed. Spread the seeds onto a cookie sheet(甜酥饼干)and bake for 20 minutes in a 300 degree oven or until they are slightly brown. 
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/G)Take the paper wrapping off about l00 caramels and put them in a saucepan(炖锅). Put the saucepan over a pan of boiling water. Boil the water until the caramels melt. Put a wooden stick into the top of each apple, dip the apple into the caramel. Let them cool on wax paper and enjoy!
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/ style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/H)No Halloween party is complete without at least one scary story. Usually one person talks in a low voice while everyone else crowds together on the floor or around a fire. The following is a retelling of a tare told in Britain and in North Carolina and Virginia. “What Do YOU Come For?” There was an old woman who rived all by herself, and she was very lonely. Sitting in the kitchen one night, she said, “Oh, I wish I had some company. ”
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);/I)No sooner had she spoken than down the chimney tumbled two feet from which the flesh had rotted. The old woman’s eyes bulged with terror. Then two legs dropped to the hearth(壁炉地面)and attached themselves to the feet. Then a body tumbled down, then two alms, and a man’s head. As the old woman watched, the parts came together into a great, tall man. The man danced around and around the room. Faster and faster he went. Then he stopped, and he looked into her eyes. “What do you come for?”  She asked in a small voice that shivered and shook. “What do I come for?” he said. “I come for YOU!” The narrator shouts and jumps at the person near him!

1.[选词填空]The “Trick or Treat!” tradition was brought to the United States by Irish immigrants.

2.[选词填空]When adults go to masquerade parties, they wear costumes which make them look like historical or political figures.

3.[选词填空]Both young and old welcome “block parties”.

4.[选词填空]Halloween is on October 31st.

5.[选词填空]Halloween was celebrated at night this made black one traditional Halloween color.

6.[选词填空]When making caramel apples, boiling water is used to melt the caramels.

7.[选词填空]Windows of a house decorated with jack-o'-lanterns mean children can get candies from the house.

8.[选词填空]The storyteller in Halloween party talks in low voice to create the scary atmosphere.

9.[选词填空]October 31st was originally celebrated ills the eve of the Celtic new year.

10.[选词填空]Before the Irish people moved to America, they celebrated Halloween by carving faces on turnips, beets or potatoes.

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