Thistourtakesyoubackinhistoryt-优题课

Why are people interested in eating raw foods or whole foods? One reason is that eating these types of food reduces the risk of acid accumulation in your body .
Raw and whole foods are usually digested more efficiently than cooked and refined foods. When we cook foods, we destroy the natural enzymes （酶） that are part of the food in its raw form. These enzymes were intended by nature to help us digest the food. When we consume food without these natural enzymes, our bodies either digest the food improperly or allow too many nutrients to be absorbed into the bloodstream. In both instances, the result is obesity. When too many nutrients are absorbed at once, the body grows fat. Improperly digested food moves slowly through the digestive tract, where it becomes increasingly acidic. To protect its vital organs from this acidic waste, the body changes the acid into fat and stores it safely away from the organs.
Processed foods contain chemical elements, which might confuse the appetite mechanism that tells us when we’ve had enough to eat; as a result, people often overeat. Processed foods also upset the digestive cycle. The body will either identify these foods as allergens and then store them safely away from the organs as fat, or the remains of undigested food will become acidic and enter the bloodstream as acid waste, which will stick to the blood vessel walls and block the passage of vital oxygen and nutrients heading for the body’s cells. The body’s metabolism （新陈代谢）becomes inactive, and the result is weight gain and obesity.
The accumulation of acid in the digestive tract makes digestion increasingly inefficient. When that happens, even healthy foods can become acidic and the food allergies will become more common.
To stop this vicious circle in its tracks, people need to consume food and supplements that will neutralize the acid already accumulated in body. Eating the right types of raw and whole foods can help. It’s also important to restore your enzyme balance. You need to identify and avoid the foods that cause acid accumulation and consume the foods that increase enzyme production. If you truly want to change and help your body heal itself, you need to take an active approach.
It can be inferred from Para. 2 that __________.

A．foods with natural enzymes help people keep fit

B．we’d better be cautious about raw and whole foods

C．it is essential for people to protect their vital organs

D．giving up cooked and refined foods is a new lifestyle

Processed foods are unhealthy because they __________.

A．destroy body’s cells	B．may lead to obesity
C．are difficult to digest	D．stop body’s metabolism

What is the main purpose of this passage？

A．To warn people of the problem of obesity.

B．To advocate eating more raw and whole foods.

C．To inform people of the harm of processed foods.

D．To tell the differences between raw and processed foods.

What is likely to be talked about following the last paragraph？

A．Different causes of acid accumulation.

B．Correct ways to cook raw foods.

C．Suitable types of raw and whole foods.

D．Active approaches to avoid acid.

After moving to the United States, immigrant groups trying to fit in tend to choose high-calorie, fatty foods in an attempt to appear more American, a new study finds. That's one reason why immigrants approach U.S. levels of obesity within 15 years of moving to America.
The researchers also did an experiment that measured whether or not the threat of appearing un-American influenced respondents' food choices．After being questioned about their ability to speak English，75percentof Asian-Americans identified a typical American food as their favorite. Only 25 percent of Asian-Americans who had not been asked if they spoke English did the same.
When their American identity was called into question during a follow-up study, Asian-American participants also tended to choose typical American dishes, such as hamburgers and grilled cheese sandwiches, over more Asian fare. In that experiment, 55 Asian-Americans were asked to choose a meal from a local Asian or American restaurant. Some participants were told that only Americans could participate in the study. Those who chose the more typical American fare ended up consuming an extra 182 calories, including 12 grams of fat and seven grams of saturated fat(饱和脂肪).
"People who feel like they need to prove they belong in a culture will change their habits in an attempt to fit in," said Sapna Cheryan, an author of the study and assistant professor of psychology at the University of Washington. "If immigrants and their children choose unhealthy American foods over healthier traditional foods across their lives, this process of fitting in could lead to poorer health," Cheryan added.
Social pressures, the study concluded, are at the heart of the problem. "In American society today, being American is associated with being white. Americans who don't fit this image even if they were born here and speak English feel that pressure to prove that they're American," said Cheryan.
According to the survey, _____.

A．Asia-Americans care less about their health.

B．25 percent of Americans like junk food.

C．choosing food is related to Asian-American’s situation

D．immigrants are forced to eat junk food.

The underlined word “fare” in Paragraph 3 most probably means “_____”

A．food offered as a meal	B．a person taking a taxi
C．money spent on food	D．an arranged thing to do

According to Sauna Cheryan, ________.

A．what immigrants have done is ridiculous

B．American traditional foods are healthier

C．immigrants risk their health in order to fit in

D．American culture affects immigrants deeply

Which of the following should take the blame for the bad eating habit?

A．The situation of employment	B．The traditional culture
C．The American government	D．The pressures from society

What's your idea of a good time? What about dancing in a rainy field with one hundred and fifty thousand other people while a famous rock band plays on a stage so far away that the performers look like ants?
It may sound strange but that is what many hundreds of thousands of young people in the UK do every summer. Why? Because summer is the time for outdoor music festivals.
Held on a farm, the Glastonbury Festival is the most well-known and popular in the UK. It began in 1970 and was attended by one thousand five hundred people each paying an admission price of £1 including free milk from the farm.
Since then the Glastonbury Festival has gone from strength to strength --- in 2004 one hundred and fifty thousand fans attended, paying £112 for tickets to the three-day event. Tickets for the event sold out within three hours. Acts included veteran superstars, such as Paul McCartney and James Brown, as well as new talent, like Franz Ferdinand and Joss Stone. Although many summer festivals are run on a profit-making basis, Glastonbury is a charity event, donating millions of pounds to local and international charities.
Glastonbury is not unique in using live music to raise money for global poverty. In July of this year, the Live 8 concerts will be held simultaneously in London, Paris, Rome and Berlin. Superstars, such as Madonna, Sir Elton John and Stevie Wonder will perform in order to highlight international poverty and debt.
What does the author mean by saying “the Glastonbury Festival has gone from strength to strength” in the fourth paragraph?

A．The festival has achieved growing success.

B．Great efforts have been made to hold the festival.

C．The festival has brought in a large amount of money.

D．There have been thousands of fans attending the festival

Which of the following is TRUE according to the passage?

A．The Glastonbury Festival is run on a profit-making basis.

B．Tickets for the 2004 Glastonbury Festival were in great demand despite the high price.

C．Both James Brown and Joss Stone were born in poor families.

D．In the 1970 Glastonbury Festival, one could have lunch on the farm for free.

We can learn from the last paragraph that __________.

A．the Glastonbury Festival is not so popular as the Live 8 concerts

B．the Live 8 concerts are held every year in London.

C．London, Paris, Rome and Berlin are famous for outdoor music festivals

D．some superstars are concerned about global poverty.

What is the best title for the passage?

A．How to have a good time

B．Charity events around the world

C．The Glastonbury Festival

D．Superstars’ performances in charity events

There has been an outpouring of love for a 23-year-old disabled woman whose dog was killed in front of her while a groomer(美容师) tried to trim(修剪) its claws.
Calls and e-mails came from as far away as the Upper Peninsula and Arizona as well as Oakland and Macomb counties, offering Laurie Crouch, who uses a wheelchair because of multiple sclerosis(硬化症), everything from dogs to money, such as that from Jason Daly of Roseville who said, “ I would like to buy her a new dog.”
A story about the death of Crouch’s pet, Gooch, was printed on the front page of Macomb Daily. Crouch said a man sat on the dog to trim its nails. Gooch died after one claw was trimmed.
Crouch yelled at the groomer to stop when she saw Gooch was struggling to breathe, but she said she was ignored. “If I could have walked, I would have put my hands on her and pulled her off my dog and physically stopped her, but I can’t do that.” Gooch was not a trained service animal, but naturally helped Crouch by picking up things for her.
“This case is absolute animal abuse(虐待),” Larry Obrecht, division manager of the Oakland County Animal Shelter in Auburn Hills, said.
People who read the story contacted Oakland Press to offer help. A message, from Rebecca Amett of Giggles N Wiggles Puppy Rescue, in Roseville, said, “We have puppies to donate … and want to help the young woman who lost her service dog.”
“When Gooch was with me, I was happy,” Crouch said, “I think I can be happy again but no animal can replace Gooch. There’s never going to be another Gooch out there but I think I will find a dog that can bring me joy again.”
What does the passage mainly tell us?

A．A disabled woman’s service dog.

B．A cruel groomer killed a disabled woman’s dog.

C．People’s love for a disabled woman who lost her dog.

D．Disabled woman loves to have the dog as company.

People called and emailed to .

A．offer help and care to Laurie Crouch.

B．give their angry voice to the groomer.

C．offer a cure for Crouch’s disease.

D．tell Crouch how to punish the groomer.

We can infer from the passage that .

A．Crouch refused to take another dog.

B．Crouch must be sad after losing her dog.

C．Crouch has accepted another dog from a stranger.

D．Crouch can live well without a dog’s company.

Most people know precious gemstones (宝石) by their appearances. An emerald flashes deep green, a ruby seems to hold a red fire inside, and a diamond shines like a star. It’s more difficult to tell where the gem was mined, since a diamond from Australia or Arkansas may appear the same to one from the Democratic Republic of the Congo. However, recently, a team of scientists has found a way to identify a gemstone’s origin.
Beneath the surface of a gemstone, on the tiny level of atoms and molecules（分子）, lie clues (线索) to its origin. At this year’s meeting of the Geological Society of America in Minneapolis, Catherine McManus reported on a technique that uses lasers (激光) to clarify these clues and identify a stone’s homeland. McManus directs scientific research at Materialytics, in Killeen, Texas. The company is developing the technique. “With enough data, we could identify which country, which mining place, even the individual mine a gemstone comes from,” McManus told Science News.
Some gemstones, including many diamonds, come from war-torn countries. Sales of those “blood minerals” may encourage violent civil wars where innocent people are injured or killed. In an effort to reduce the trade in blood minerals, the U.S. government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones.
To figure out where gemstones come from, McManus and her team focus a powerful laser on a small sample of the gemstone. The technique is called laser-induced breakdown spectroscopy. Just as heat can turn ice into water or water into steam, energy from the laser changes the state of matter of the stone. The laser changes a miniscule part of the gemstone into plasma, a gas state of matter in which tiny particles（微粒）called electrons separate from atoms.
The plasma, which is superhot, produces a light pattern. (The science of analyzing this kind of light pattern is called spectroscopy.) Different elements produce different patterns, but McManus and her team say that gemstones from the same area produce similar patterns. Materialytics has already collected patterns from thousands of gemstones, including more than 200 from diamonds. They can compare the light pattern from an unknown gemstone to patterns they do know and look for a match. The light pattern acts like a signature, telling the researchers the origin of the gemstone.
In a small test, the laser technique correctly identified the origins of 95 out of every 100 diamonds. For gemstones like emeralds and rubies, the technique proved successful for 98 out of every 100 stones. The scientists need to collect and analyze more samples, including those from war-torn countries, before the tool is ready for commercial use.
Scientists like Barbara Dutrow, a mineralogist from Louisiana State University in Baton Rouge, find the technique exciting. “This is a basic new tool that could provide a better fingerprint of a material from a particular locality,” she told Science News.
We learn from Paragraph 1 that __________.

A．an emerald and a ruby are names of diamonds.

B．it’s not difficult to tell where the gem was mined.

C．appearances help to identify the origin of gemstones.

D．diamonds from different places may appear the same.

Why did the U.S. government pass law that requires companies selling gemstones to determine the origins of their stones?

A．To look for more gemstones.

B．To encourage violent civil wars.

C．To reduce the trade in blood minerals.

D．To develop the economy.

Which of the following facts most probably helps McManus and her team in identifying the origin of stones?

A．Heat can turn ice into water or water into steam.

B．Gemstones from the same area produce similar light patterns.

C．Laser can change a miniscule part of the gemstone into plasma.

D．Materialytics has already collected patterns from thousands of gemstones.

From the last two paragraphs, what can be inferred about the laser technique?

A．It is ready for commercial use.

B．People can use the new tool to find more gemstones.

C．It can significantly reduce the gemstones trade in blood minerals.

D．It will bring about a revolutionary change in identifying the origin of minerals.

The author wrote this passage mainly to __________.

A．tell us how to identify the origin of diamonds.

B．introduce a laser technique in identifying a stone’s origin

C．prove identifying the origin of gemstones are difficult

D．attract our attention to reducing trade in blood minerals