You can tell a lot about people by looking at their hair — not just whether they brush, spray or blow-dry. Scientists have found a way to use hair to figure out where a person is from and where that person has been. The finding could help solve crimes, among other useful applications.
Water is central to the new technique. The liquid makes up more than half an adult human’s body weight. Our bodies break water down into hydrogen(氢) and oxygen. Atoms of these two elements end up in our tissues, fingernails, and hair.
But not all water is the same. Hydrogen and oxygen atoms can vary in how much they weigh. In the case of hydrogen, for example, there are three types according to their weights. Each type is called a hydrogen isotope(同位素). And depending on where you live, tap water contains different isotopes.
Can hair record this information? That’s what James R. Ehleringer, an environmental chemist at the University of Utah, wondered. To find it out, he and his colleagues collected hair from hair stylists in 65 cities across the United States. Even though people drink a lot of bottled water these days, the researchers have found that people’s hair has the same isotopes as found in local tap water. That’s probably because people usually cook their food with the local water.
Authorities can now use the information to analyze hair samples from criminals or crime victims and narrow their search for clues. For example, one hair sample used in Ehleringer’s study came from a man who had moved from San Francisco to Salt Lake City. As his hair grew, it reflected his change in location.
1.What do we know about the hydrogen isotopes according to Paragraph 3?
A. They are classified by size.
B. Each type of them differs in weight.
C. They can improve the quality of tap water.
D. Some of them cannot combine with oxygen.
2.Why is it possible to know where people are from by analyzing their hair?
A. People use the same bottled water.
B. People wash their hair in different ways.
C. People’s hair is affected by the weather of the places they stay.
D. People’s hair indicates the type of water in the places they stay.
3.The last paragraph is mainly to show _______.
A. how to recognize criminals B. how to collect hair samples
C. the usefulness of hair analysis D. the process of Ehleringer’s study
4.Which of the following can be the best title for the passage?
A. Water composition B. Change your hair
C. Hair detectives D. No way out
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.”
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 Couniban, a professor at Millersville University in Pennsylvania, “so there was a very important interconnection between eating together and strengthening family ties.”
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 energetic than our ancestors.
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.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.
2.What does “cultural metabolism”（Line 1, Para. 3) refer to？
A. Evolutionary adaptation. B. Changes in lifestyle.
C. Social progress. D. Pace of life.
3.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.
4.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.
For families on vacation, a playground provides a welcome break. It can also provide a glimpse into the local culture, from the setup of the park to the ways families interact. Here are the designs that live up to that challenge.
Fruit and Scent Playground, Stockholm
Is there a picky eater on a steady diet of chicken fingers and cheese? Perhaps a trip to Sweden’s Fruit and Scent Playground will change his or her culinary(烹饪的) tune. This playground features a banana slide, an orange seesaw, pear huts, a watermelon jungle gym and a pair of cherry swings, all designed by public artist Johan Ferner Strom. Now, who can say you can’t play with your food?
Nishi Rokugo Park, Tokyo
Located between central Tokyo and the city of Kawasaki, Nishi Rokugo combines recycled rubber tires(橡胶轮胎) with traditional playground equipment. In total, more than 3,000 tires of different sizes are used to create tunnels, bridges, tall sculptures for climbing and, of course, tire swings. There’s little shade, so you can visit here in the early morning or late afternoon for the most comfortable weather, and be sure to wear your play clothes.
Bicentennial Children’s Park, Santiago, Chile
Bicentennial Children’s playground in Metropolitan Park was built to celebrate 200 years of Chilean independence and improve the lives of Santiago citizens. Dozens of slides are built into the slope, creating a design completely complementary(互为补充的) of the surrounding landscape. Fountains offer some relief from the sun, and ample seating gives parents a place to relax.
1.What can be learned about Fruit and Scent Playground?
A. It is located in Tokyo, Japan.
B. Its design was led by some artists.
C. It is aimed at balancing people’s diet.
D. Its facilities are modeled after fruits.
2.When visiting Nishi Rokugo Park, it is better to ________.
A. wear thick protective clothes
B. avoid moments when it’s hot
C. take umbrellas and raincoats
D. watch out for the equipment
3.Why does the author recommend Bicentennial Children’s Park?
A. It becomes part of the surroundings.
B. It was built to improve people’s lives.
C. It amuses kids and helps parents get relaxed.
D. It provides slides for both children and adults.
上周我们学校开展职业规划的活动。请用英语写一篇短文给China Daily投稿，文章须包括以下内容：
1.简要介绍开展的相关活动（主题班会；邀请专家开讲座；学生编排剧本等）；
2.介绍职业规划的意义；
3.谈谈你自己的职业规划。
注意：
1.词数100左右；
2.可适当增加细节，以使行文连贯；
3.文中不得透露个人真实信息
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文.文中共有10 处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词：
2.只允许修改10处，多者（从第11处起）不计分。
Dear friends,
May I have you attention, please? I'm going to talk about something focusing in Protecting Wildlife. So far millions of species have died off or, have endangered mainly for two reasons. For one thing, man has been killing them for food or other commercial reasons. Take antelopes for example. Poachers hunt them for their fur, that can be made into luxurious shawls. For another, human civilization has been developing very fast that man has invaded and destroyed wild animals' natural habitats. Human activity have greatly threatened their existence. If all the wild animals disappear one day from the planet, humans would feel lonely. The world is beautiful for its diversity. Besides, some animals are extreme useful in the field of science, while others are especially adorable, unique, and keep us a good company. However, we should learn to share the earth with them. Thank you for your time.
1.Being tall was Yao Ming's __________ over other players.
2.Honesty is one of the most valued q__________.
3.Our service in the school has been extended, which means we can't expect __________ until 65.（退休）
4.H__________ from view by a row of tall trees, the house is hard to spot.
5.Public __________ is preferred by many commuters （通勤者）to avoid traffic jams.
6.Moon landings m__________ a new beginning of an era.
7.His __________（多文化的） background won him the post as an international market manager.
8.Seeing the injured driver s__________ to his feet, I stopped him immediately.
9.It is theoretically possible to bring e__________ animals back to life.
10.The movie “Lalaland”（爱乐之城）is well __________ watching.
