At age 61, identical twins Jeanne and Susan no longer look exactly alike. Susan smoked for many years and is an admitted sun worshipper, whose habits Jeanne does not share. A new study of twins suggests you can blame those coarse(粗糙的)wrinkles, brown or pink spots on too much time in the sun, smoking, and being overweight.
Because twins share genes, but may have different exposures to environmental factors studying twins allows an “opportunity to control for genetic susceptibility(易受影响性),” Dr. Elma D. Baron, at Case Western Reserve School of Medicine in Cleveland, Ohio, and his colleagues explain in the latest issue of Archives of Dermatology.
Their analysis of environmental skin-damaging factors in 65 pairs of twins hints that skin aging is related more to environment and lifestyle than genetic factors.
But when it comes to skin cancer, the researchers say their findings support previous reports that both environment and genes affect skin cancer risk.
Baron’s team examined facial skin of 130 twins, 18 to 77 years old, who lived mostly in the northem Midwest and Eastern regions of the US, who were attending the Twins Days Festival in Ohio in August 2002. At this time, each of the twins also separately reported how their skin burned or tanned(晒黑)without sunscreen, their weight, and their history of skin cancer, smoking, and alcohol drinking. The study group consisted of 52 fraternal(异卵双生)and 10 identical twin pairs, plus 3 pairs who were unsure of their twin status.
From these data, the researchers noted strong ties, outside of twin status, between smoking, older age, and being overweight, and having facial skin with evidence of environmental damage. By contrast, sunscreen use and drinking alcohol appeared related to less skin damage.
Baron and his colleagues say the current findings, which highlight ties between facial aging and potentially avoidable environmental factors—such as smoking, being overweight, and unprotected overexposure to the sun’s damaging rays—may help motivate people to minimize these risky behaviors.
67．Which of the following is true according to the passage?
A．Jeanne and Susan share all the habits including smoking.
B．Skin aging is related more to environment and lifestyle than genetic factors.
C．Only identical twins can take part in the research.
D．Sunscreen use cannot help people have less skin damage.
68．Why did Baron’s team do the research on twins?
A．Twins are more likely to suffer from skin cancer.
B．It may guarantee the research is not influenced by genetic factors.
C．It gives others an opportunity to control twins’ genes.
D．It helps find twins are exposed to different environments.
69．What can you infer from the last paragraph?
A．This research makes people aware of dangerous lifestyles.
B．The environmental factors are unavoidable.
C．Being exposed to the sun is absolutely damaging.
D．There is little relationship between skin aging and environment.
70．The passage is mainly concerned with___________
A．skin cancer and environment
B．identical twins research
C．aging skin and environmental factors
D．genes and lifestyles
If you want fully enjoy your vacation, you’d better check the Durban City Tours! This is actually one of the best choices in South Africa today.
There is nothing more relaxing than to think about that there is a place to go and relax, right? City life is strained, but you can escape this situation and be in the place where there is nothing but relaxation. Here in Durban you will get to see all the amazing tourist attractions. If you love animals and want to see some elephants wandering around the streets, then Durban is the place to go. You can even get to ride one if you want!
Here you will also get to taste all the delicious South African food. You can choose from Italian cooking to its native dishes. Durban is a great place to tour with your friends and family. You will learn a lot about its history through the landmarks you will see down the streets. Tourists and even the local villagers just can’t get enough of these treats!
However, it is important that you make the necessary arrangements. There are actually lots of tour guides that will help you as you make your journey along the streets of Durban. But if you prefer the best tour guides here in Durban, then you’d better choose the Street Scene Tours. Their staff are all well-trained and professional. They will certainly make your stay here an unforgettable one. No wonder tourists prefer the Street Scene Tours when it comes to Durban City Tours.The underlined word “strained” in Para. 2 means ______.
| A．easy | B．stressful |
| C．relaxing | D．wonderful |
What is the main idea of Paragraph 2?
| A．Durban is a relaxing city. |
| B．People don’t like city life. |
| C．It is good to have a place to relax. |
| D．One can have fun riding elephants. |
If you walk in the streets of Durban, what will impress you most?
| A．Tourists from all over the world. |
| B．The buildings and many kinds of animals. |
| C．The streets and some wandering elephants. |
| D．The friendly local people and the scenery. |
The author wrote the last paragraph mainly to ______.
| A．attract tourists to Durban |
| B．help readers make arrangements |
| C．introduce the tour guides |
| D．persuade tourists to choose the Street Scene Tours |
If you want to get the most out of the study of a language, you must also read for pleasure: novels, plays, travel books, and so on. And in reading books of this kind the important thing is to get on with reading; to try to grasp what the writer is going to tell you in the book as a whole. This is impossible if you stop and think over the meaning of every single word which happens to be unfamiliar. You can not enjoy a story if you stop half a dozen times on every page in order to look up words in the dictionary. You may even prevent yourself from understanding the story as a whole by doing this.
When you are reading books of this kind, therefore, you will usually have to rely mainly on the context to help you. If you meet an unfamiliar word, do not let it take too much of your attention from the main thread(主线) of the story. In all probability you will meet the same word again a few pages later on in a slightly different context, and each time you see it that your understanding of it will become more exact.The phrase “to get on with reading” in the passage has the same meaning as “_________”.
| A．to try to grasp the meaning of every sentence in the book |
| B．to try to catch the meaning of every word in the book |
| C．to try to understand all the writer is going to tell you |
| D．to try to understand the main idea of the book |
When you meet new words in reading such kinds of books, you’d better _________.
| A．stop and look them up in a dictionary |
| B．stop and think them over |
| C．try to guess their meanings from the context |
| D．have none of them |
From the passage the best way to read novels, plays and travel books is _____.
| A．to read very slowly |
| B．to read quickly and not too carefully |
| C．to read very carefully |
| D．to read very seriously |
The best title for this passage is “___________”.
| A．Read for Pleasure |
| B．Get on with the Books |
| C．Reading Skills |
| D．The Importance of Reading |
QINGDAO—Water and power supplies have been restored in the East Chinese city of Qingdao, the site of an oil pipeline explosion on Friday, the local government said on Monday.
Crude oil began leaking(泄漏)from the pipeline at 3：00 a．m. Friday in Qingdao in Shandong province. The valves(阀门)of the Huangdao oil warehouse were shut about 15 minutes later.The oil spill(泄漏的石油)then flowed into the city's rainwater pipe network, which empties into Jiaozhou Bay. Explosions occurred at two locations around 10：30 a．m. Friday when workers were clearing the spill.
According to the local government, about 85 percent of public heating and 90 percent of the gas supply were also brought back to normal as of Monday.
Residents who have been taken to the temporary settlements are receiving bottled water and bread.
Many schools and kindergartens have reopened classes after Friday's oil pipeline explosion. No injuries and deaths of students or teachers have been reported following the explosions at an underground pipeline operated by Sinopec. The school buildings of one middle school in the district were seriously damaged during the explosions. Education authorities have arranged psychological help for students and teaching staff. All other 18 schools and kindergartens in the district reopened classes on Monday.
As of Monday noon, the death toll from the explosion had risen to 55, with 9 people still missing and 136 hospitalized. According to local police, 49 bodies have been identified so far, and 42 of them were male victims. As of Monday morning, the blood supply in Qingdao was enough for the injured after more than 950 people in the city donated more than 340,000 ml of blood in the wake of the incident.The underlined word “restored” in the first paragraph probably means “________”．
| A．cut | B．recovered |
| C．destroyed | D．repaired |
We can learn that by Monday noon the deaths in the explosion reached at least ________.
| A．64 | B．49 |
| C．42 | D．55 |
We can learn from the passage that ________.
| A．everything was brought back to normal right after the explosion |
| B．no measures were taken to help the suffering people out of trouble |
| C．all the 19 schools in the district were affected by the explosion |
| D．no more dead body was found after Monday noon |
Apply early to assure your place! Please sign up now!
Songs of Hope is an overnight performing arts summer camp in Saint Paul, Minnesota, USA for kids aged 10 and older from around the world. More than just a performing arts camp, Songs of Hope offers participants a unique opportunity to live with kids from other cultures while learning and performing music from many countries.
Each summer, up to 75 children venture to Minnesota from Europe, Asia, Africa, Latin America, the Middle East, and the US. They arrive as strangers but soon become friends as they learn popular songs and dances from each other's cultures. The lessons learned during these six weeks are profound (深远的). The friendships are enduring. And the stories are inspirational. Taking part in the Songs of Hope camp is a lifechanging experience.
DATES
The Songs of Hope 2013 session will run from June 17 to July 30. Because Songs of Hope is a global camp, it is impossible for us to schedule the program to fit all the school schedules of all the schools in the world. Therefore, we understand that some participants may need to arrive late or leave early. Don't let that stop you from applying! We are happy to make special arrangements as needed. Just send us an email to explain your scheduling challenges. We are happy to arrange a special study room for late arrivals to make up for the missing lessons.
PARTICIPANT FEE
For the 2013 summer, the fee for new, firsttime participants is $2,950, subject to the special discounts offered below.
SPECIAL DISCOUNTS
If you apply before February 28, you get a special fee reduction of $100. Also, there is a 20% fee discount for additional participants from your family if you have a brother or sister who is a Songs of Hope participant. The discount applies to the second, third, and any other additional siblings attending in the same year from the same family.The Songs of Hope 2013 session will last about ______.
| A．three weeks | B．five weeks |
| C．nine weeks | D．six weeks |
The summer camp will help kids in the following ways EXCEPT ________.
| A．making more international friends |
| B．improving their performing ability |
| C．traveling around the US |
| D．learning more about other cultures |
What will happen if you arrive late?
A．They will give you a special discount.
B．You will have to miss some lessons.
C．You will have to attend the next year's camp.
D．They will make up for the missed lessons.
【小题4If you and your sister apply for the first time on May 18, how much will both of you pay in total?
A．$5,310. B．$4,720.
C．$5,900. D．$6,100.
Learning to speak English well may be the best thing you can do to improve your life. That's right. If you can communicate in English, you can:
Contact people from all over the world. Talk about your ideas and opinions on Internet discussion groups. Send email to interesting people.Learn about their life and culture.
Travel more easily. Communicate with people wherever you go—English is spoken in more than 100 countries (source). Ask directions, have a conversation, or...ask for help. Who knows, maybe English will save your life someday!
Push your career forward. If you want a good job in business, technology, or science, get out of that armchair and start learning English now! (If you already have a good job, start learning before you lose it!)
Knowing English will let you:
Put “excellent knowledge of English” on your CV. Get your dream job, and earn more money.
Gain technical knowledge. English is the language of technology, especially high technology like computer science, genetics, and medicine. If you're going to read about technology, you'll probably have to do it in English.
Learn computer science. Read technical articles without difficulty. Or write your own articles!
Be a worldclass businessman (or woman). It's simple. International business is done in English. And all business today is international. So if you want to play, you have to know English—to contact other business people, go to conferences, read international business newspapers and magazines, etc.
Become a better scientist. Contact scientists from other countries, go to international conferences, visit academic centers abroad. Learn about new scientific discoveries by reading papers, books, and magazines.
Use your computer more effectively. Most computer applications are in English, so you will understand them better—and become a better employee.According to the passage, knowing English will let you ______.
| A．travel in your country more easily |
| B．gain technical knowledge |
| C．contact people all over your country |
| D．watch television networks |
Sending email to interesting people is a way to ______.
| A．learn knowledge |
| B．contact people |
| C．become a better scientist |
| D．work better |
A worldclass businessperson may ______.
| A．write his/her own articles |
| B．read international business newspapers |
| C．talk about his/her ideas and opinions |
| D．read about technology |
If you don't learn English, you may lose ______.
| A．your good job | B．your family |
| C．your friends | D．your game |