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5月15日,某交易所8月份黄金期货合约的价格为399.5美元/盎司,10月份黄金期货合约的价格为401美元/盎司。某交易者此时入市,买入一份8月份黄金期货合约,同时卖出一份10月份黄金期货合约。在不考虑其他因素影响的情况下,下列选择中该交易者亏损的是(  )。

A8月份黄金合约的价格涨至402.5美元/盎司,10月份黄金合约的价格涨至401.5美元/盎司

B8月份黄金合约的价格降至398.5美元/盎司,10月份黄金合约的价格降至399.5美元/盎司

C8月份黄金合约的价格涨至402.5美元/盎司,10月份黄金合约的价格涨至404.5美元/盎司

D8月份黄金合约的价格降至398.5美元/盎司,10月份黄金合约的价格降至397美元/盎司

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某铝型材厂决定利用铝期货进行买入套期保值。3月5日该厂在7月份到期的铝期货合约上建仓,成交价格为20600元/吨。此时铝锭的现货价格为20400元/吨。至6月5日,期货价格涨至21500元/吨,现货价格也上涨至21200元/吨。该厂按此现货价格购进铝锭,同时将期货合约对冲平仓。通过套期保值操作,该厂实际采购铝锭的成本是( )元/吨。

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style=text-align: justify; style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 21px; white-space: normal; background-color: rgb(255, 255, 255);/Questions 51 to 55 are based on the following passage.
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 21px; white-space: normal; background-color: rgb(255, 255, 255);/  In agrarian(农业的) , pre-industrial Europe, “you’d want to wake up early, start working with the sunrise, have a break to have the largest meal, and then you’d go back to work,” says Ken Albala, a professor of history at the University of the Pacific. “Later, at 5 or 6, you’d have a smaller supper.”
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 21px; white-space: normal; background-color: rgb(255, 255, 255);/  This comfortable cycle, in which the rhythms of the day helped shape the rhythms of the meals, gave rise to the custom of the large midday meal, eaten with the extended family. “Meals are the foundation of the family,” says Carole Counihan, a professor at Millersville University in Pennsylvania, “so there was a very important interconnection between eating together” and strength-eating family ties.
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 21px; white-space: normal; background-color: rgb(255, 255, 255);/  Since industrialization, maintaining such a slow cultural metabolism has been much harder, with the long midday meal shrinking to whatever could be stuffed into a lunch bucket or bought at a food stand. Certainly, there were benefits. Modern techniques for producing and shipping food led to greater variety and quantity, including a tremendous increase in the amount of animal protein and dairy products available, making us more vigorous than our ancestors.
style=margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 21px; white-space: normal; background-color: rgb(255, 255, 255);/  Yet plenty has been lost too, even in cultures that still live to eat. Take Italy. It’s no secret that the Mediterranean diet is healthy, but it was also a joy to prepare and eat. Italians, says Counihan, traditionally began the day with a small meal. The big meal came at around 1 p.m. In between the midday meal and a late, smaller dinner came a small snack. Today, when time zones have less and less meaning, there is little tolerance for offices’ closing for lunch, and worsening traffic in cities means workers can’t make it home and back fast enough anyway. So the formerly small supper after sundown becomes the big meal of the day, the only one at which the family has a chance to get together. “The evening meal carries the full burden that used to be spread over two meals,” says Counihan.

1.[单选题]What does the author say about Italians of the old days?

A.They enjoyed cooking as well as eating.

B.They ate a big dinner late in the evening.

C.They ate three meals regularly every day.

D.They were expert at cooking meals.

2.[单选题]What does the author think of the food people eat today?

A.Its quality is usually guaranteed.

B.It is varied, abundant and nutritious.

C.It is more costly than what our ancestors ate.

D.Its production depends too much on technology.

3.[单选题]What does Professor Carole Counihan say about pre-industrial European families eating meals together?

A.It was helpful to maintaining a nation’s tradition.

B.It brought family members closer to each other.

C.It was characteristic of the agrarian culture.

D.It enabled families to save a lot of money.

4.[单选题]What do we learn from the passage about people in pre-industrial Europe?

A.They had to work from early morning till late at night.

B. They were so busy working that they only ate simple meals.

C. Their daily routine followed the rhythm of the natural cycle.

D.Their life was much more comfortable than that of today.

5.[单选题]What does “cultural metabolism” (Line 1, Para. 3. refer to?

A.Evolutionary adaptation.

B.Changes in lifestyle.

C.Social progress.

D.Pace of life.

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某金矿公司预计3个月后将出售黄金,故先卖出黄金期货,价格为298美元,出售黄金时的市价为308美元,同时以311美元回补黄金期货,其有效黄金售价为( )。

A308美元

B321美元

C295美元

D301美元

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