Earlier this month, two rock climbers achieved what many thought impossible: They climbed up the 3,000-foot-high Dawn Wall in Yosemite NationalPark without specialized equipment. Climbing without this equipment iscalled“free-climbing.”Until now, no one had free-climbed to the top of the rockface, which is a part of the mountain EI Capitan.

    El Capitan, which means“the captain”or“the chief”in Spanish, has always presented a challenge to climbers. But the Dawn Wall, on the mountain's southeast face, is a particularly difficult route to the summit (顶峰). It is a rock formation that is both steep and relatively smooth. This makes free-climbing the rock face seem almost impossible.

    About seven years ago, professional climber Tommy Caldwell spotted a possible route up the wall. It took years of planning and preparation, but this month, Caldwell, 36, and his friend Kevin Jorgeson, 30, finally make the climb.

    Free climbers do use ropes and other basic safety equipment to catch them if they fall — and Caldwell and Jorgeson fell often. Before starting their climb, they broke down their route into 32 sections. Each section was based on a rope length called a“pitch.”The rope was secured into the rock faceto catch the climbers if they fell.

    Caldwell and Jorgeson's goal was to climb the DawnWall without returning to the ground. If they fell, they had to start that pitch all over again. The two men started climbing on December 27. They slept in hanging tents, and a team of friends brought them food each day.

    The men had spent years rehearsing (排练) them ovements it would take to get through each pitch. They made it through the fist half of the climb relatively easily. But halfway up, Jorgeson ran into trouble. In one difficult spot, he fell each time he attempted to climb. After10 days of trying, Jorgeson finally made it to the next pitch.

    Getting through that troublesome pitch gave both climbers renewed energy. They finished the rest of the climb five days later, on January 14.

    There is no doubt that to study abroad gives you an excellent opportunity to learn things which are very helpful in your career building. Today Canada has earned a good name in providing quality education and safe healthy environment for its students. That is why more than 130,000 international students enroll (登记入学) every year in famous Canadian universities. It is an ideal education destination and gives students a unique experience education and its versatile (多样的) arts and culture. Canada spends a lot on education and is ranked the highest in G-8 countries.

    To study in Canada is very cheap．These universities are affordable compared to other universities in the world such as in the US, New Zealand and UK where cost of education and living is very high．According to a survey in 2006, “Canada offered the lowest tuition fees (学费) for foreign students compared to UK and Australia.”

    The low rate of crimes and the peaceful safe environment of the country also attract a lot of international students to Canadian universities. Canada has 92 universities and 175 community colleges and university degrees have three levels—Bachelor's, Master's and Doctoral.

    A Bachelor's degree in Canada is for three or four years' full-time study depending on the nature of the program you are doing. On the other hand, a Master's degree consists of two years of study. For a Doctoral program in Canadian universities, you require a minimum (最低/小的) of three to four or sometimes five years of research and study.

    You can also find many diploma (文凭) and certification (认证) programs in Canadian universities where the time is generally one year．Some of the Canadian universities are well-regarded worldwide and the degree and diploma obtained from these Canadian universities are recognized globally and promise bright future. After the completion of studies, a person could also find great job offers in Canada itself. International students require a work permit to work on campus.

    There are many weight loss products，plans and programs in the market.However,if most of these programs were effective，we would see obesity trends reversing,yet we are witnessing more and more people struggling with weight.

    Experiences of dieters regaining pre-dieting weight within 5 years are common.Therefore,a fitness program that works over a long period of time is something you should be looking for.Before reaching for your wallet or purse,make sure the program is exactly what it claims to be.

Professional endorsement(认可)

    A good program should not insist on offering pills, injections, powders or similar products that are not endorsed by a medically trained professional.You choice of programs should have been designed by a medically trained professional.

Unreallstic promises

    A good program should not make unrealistic promises，such as“To lose 5 pounds in a week,with no exercise!” Therefore,it is advisable to judge whether the promises being made are realistic.The plan should also have a high success rate of weight loss.

Qualification

    A weight loss program should consider the health of the applicants.It should consider their age,medical condition,gender,health background，medication and more,in order to make a plan that meets the needs of every applicant.A good program should include diet and exercise in order to promote permanent and good health.

Restriction

    A good program should not overly restrictive(限制的)on food allowances.Some programs ask you not to eat foods from the main nutrient food groups like fruit and vegetables.A successful weight loss plan,for most people,should not involve less than 1,200 calories per day.

Cost effective

    A long-term program does not have to cost you lots of money.An effective plan that is reasonably priced can save you a large sum of money that can be spent on other healthy habits.This car in turn improve your lifespan.

    We provide the best information about weight loss program.For further details please visit the provided links.

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    You may not know a lot of people when you start high school. Even if you know some new students, you still feel nervous that you don't know any upperclassmen (高年级学生) and teachers. How are you going to make friends among this sea of unknown faces?

    Most high schools welcome new students before school actually starts. These are helpful not only because you learn your way around the buildings and get to meet some of your teachers, but also because you get to meet new students. That way, when you show up on your first day of school, you may already recognize a few familiar faces.

    When you talk to people, you'll probably find that a lot of them are feeling just like you. They're all new to the school and don't know what to expect. Talking about a common concern with your classmates can help you develop friendships.

    The work in high school is something freshmen are probably worried about. The work in high school builds on what you learned in middle school, giving you a more advanced knowledge of many subjects. So you may find you have more work to do or that it's a bit more challenging (有挑战性的). If you ever find your work too difficult, teachers can give you extra help.

    High school also has more activities after class than middle school, such as clubs, music and theater groups and sports teams. This is a good time to explore your interests and try new things.

    Middle school taught you the basics of academics, time management, and social skills while providing you with a little extra support and guidance. High school gives you the chance to learn how to be more independent (独立的) and responsible (有责任的).

    My teacher, Mr. August J. Bachmann, was the most influential teacher I ever had.

    I had gotten into trouble in his class: Another student had pushed me for fun, and I became angry and began to hit him. Mr. Bachmann stopped the fight, but instead of sending me to the office, he sat me down and asked a simple question, "Penna, why are you wasting your life？Why aren't you going to college?"

    I didn't know anything about colleges or scholarships. No one had ever considered that a fatherless boy from the poorest neighborhood had a future. That day, instead of rushing off for lunch, he stayed and explained possible education options to me. At the end of our talk, he sent me to see a secretary who had a child at a state college. This was in 1962 at Emerson High School in Union City, New Jersey.

    Well, 55 years have passed, and what have I done with the knowledge he gave me？I gained a PhD from Fordham University when I was only 29.I taught English and social studies and then moved up the chain of command from teacher to principal(校长).

    I've sat on the board for Magnet Schools of America and represented that organization at the United Nations. I've won a number of great educational awards. But where would I be if a truly caring teacher had not taken the time out of his lunch period to speak to me? It was without question only his confidence in me that helped me forward.

    I have repaid his kindness hundreds of times by encouraging misguided youngsters to aim higher. If I have saved any children, it is because of him. If I have been a successful educator, it is because I had a great role model in Mr. Bachmann.

    It is well known that male humpback whales(座头鲸)are skilled singers. Their songs are thought to attract females in high frequency sounds while to compete with other males in low frequency sounds. Research led by the Wildlife Conservation Society has now made a new discovery.

    The study looked at the songs of two humpback whale populations, based on sound recordings collected from 2013 to 2018. One group was based in the South Atlantic, off the coast of Gabon, and the other in the Indian Ocean near Madagascar.  Analysis of the recordings showed that the two groups picked up musical ideas from each other and borrowed phrases and themes into their latest song. This suggested that the males from the two groups came into contact with each other over the five years and shared songs.

    To uncover this musical cooperation, researchers recorded the songs and transcribe them into more than 1,500 individual sounds and patterns, or song units.  They found that the units were composed into larger phrases, which were then repeated to form themes. These themes were sung for hours at a time, or even days. By 2018, both populations have been singing largely the same songs.

    "This similarity in the songs shows that these two populations come into closer contact than other southern populations, explains Dr Melinda Rekdahl, leading author of the study. As well as being an interesting phenomenon, she explains that those songs allow even greater insight into the workings of the humpback whale populations.