Knots are the kind of stuff that even myths are made of.In the Greek legend of the Gordian knot, for example, Alexander the Great used his sword to slice through a knot that had failed all previous attempts to unite it. Knots, enjoy a long history of tales and fanciful names such as “Englishman’s tie, ” “and “cat’s paw. ” Knots became the subject of serious scientific investigation when in the 1860s the English physicist William Thomson (known today as Lord Kelvin) proposed that atoms were in fact knotted tubes of ether（醚）. In order to be able to develop the equivalent of a periodic table of the elements, Thomson had to be able to classify knots — find out which different knots were possible. This sparked a great interest in the mathematical theory of knots.
A mathematical knot looks very much like a familiar knot in a string, only with the string’s ends joined. In Thomson’s theory, knots could, in principle at least, model atoms of increasing complexity, such as the hydrogen, carbon, and oxygen atoms, respectively. For knots to be truly useful in a mathematical theory, however, mathematicians searched for some precise way of proving that what appeared to be different knots were really different — the couldn’t be transformed one into the other by some simple manipulation（操作）. Towards the end of the nineteenth century, the Scottish mathematician Peter Guthrie Tait and the University of Nebraska professor Charles Newton Little published complete tables of knots with up to ten crossings. Unfortunately, by the time that this heroic effort was completed, Kelvin’s theory had already been totally discarded as a model for atomic structure. Nevertheless, even without any other application in sight, the mathematical interest in knot theory continued at that point for its own sake. In fact, mathematical became even more fascinated by knots. The only difference was that, as the British mathematician Sir Michael Atiyah has put it, “the study of knots became a special branch of pure mathematics. ”
Two major breakthroughs in knot theory occurred in 1928 and in 1984. In 1928, the American mathematician James Waddell Alexander discovered an algebraic expression that uses the arrangement of crossings to label the knot. For example, t2-t+1 or t2-3t+1, or else. Decades of work in the theory of knots finally produced the second breakthrough in 1984. The New Zealander-American mathematician Vaughan Jones noticed an unexpected relation between knots and another abstract branch of mathematics, which led to the discovery of a more sensitive invariant known as the Jones polynomial.What is surprising about knots?
| A．They originated from ancient Greek legend. |
| B．The study of knots is a branch of mathematics. |
| C．Knots led to the discovery of atom structure. |
| D．Alexander the Great made knots well known. |
What does the underlined word “that” in Paragraph 3 refer to?
| A．No other application found except tables of knots. |
| B．The study of knots meeting a seemingly dead end. |
| C．Few scientist showing interest in knots. |
| D．The publication of complete tables of knots. |
According to the passage, ______ shows the most updated study about knots.
| A．t2-t+1 | B．t2-3t+1 |
| C．Alexander polynomial | D．Jones polynomial |
Which one would be the best title for this passage?
| A．Mathematicians VS Physicians |
| B．To be or Knot to be |
| C．Knot or Atom |
| D．Knot VS Mathematics |
The expression “a thirst for knowledge" may soon have a new meaning for millions of people who have no way to get clean water. Researchers have developed a book with specially treated pages that can turn dirty water into clean and drinkable water. They say their invention could improve the lives of many in the developing world.
About 700 million people around the world are at risk of disease or even death because their drinking water is not clean. The water is polluted by harmful bacteria.
The book contains 25 pages. Each page is about one millimeter thick. The pages contain very small particles (微粒) of silver. The pages can be used as filters（过滤器）to remove harmful microorganisms (微生物) that can pollute drinking water. The filter kills the organisms that pass through it.
Pictures on the pages show the dangers of dirty water and how to use the book for those unable to read. The pages are made of filter paper. They are designed to be torn from the book. Water can be poured through the paper to be cleaned.
Ms. Dankovich, the inventor, says each page can treat up to 100 liters of water. She recently presented her invention at the meeting of the American Chemical Society in Boston, Massachusetts. She was asked whether she had considered adding classic literature on the book's pages.
"The idea of classic texts—that's of interest maybe later. We have discussed a little bit more exciting text. But we really haven't had the time to go through that part," she says.
Teri Dankovich and another researcher tested the drinkable book in Bangladesh, Ghana and South Africa. The tests proved to be successful.
Water for Life, a non-governmental organization, has provided financial support for the project.What do we learn about the book from the text?
| A．It sells well around the world. |
| B．It has pages with several functions. |
| C．It is about environment protection. |
| D．It can treat about 100 liters of water. |
What does the underlined phrase "that part" in Paragraph 6 refer to?
| A．Classic texts. | B．Invention presentation. |
| C．Exciting discussion. | D．Financial support. |
In which country did not the researchers test the drinkable book?
| A．Bangladesh. | B．Ghana |
| C．South Africa. | D．America. |
What is the main idea of the passage?
| A．Researchers have found a way to save those being ill. |
| B．Millions of people are in great need of drinkable water. |
| C．Book pages could provide safe drinking water. |
| D．Knowledge is as important as drinkable water. |
Most book reviews start with a heading that includes all the basic information about the book, like:
Title.
Author.
Place of publication, publisher, date of publication.
Number of pages.
Like most pieces of writing, the review usually begins with an introduction that lets your readers know what the review will say. The first paragraph usually includes the author and title again, so your readers don’t have to look up to find this information. You should also include a very brief description of the contents of the book, the purpose or audience for the book, and your reaction and evaluation.
Then you move into a section of background information that helps place the book in context and discusses criteria (准则）for judging the book. Next, the review gives a summary of the main points of the book, quoting and explaining key phrases from the author. Finally, you get to the heart of your review – your evaluation of the book. In this section, you might discuss some of the following issues:
how well the book has achieved its goal
what possibilities are suggested by the book
what the book has left out
how the book compares with others on the subject
what specific points are not convincing
what personal experiences you’ve had related to the subject.
It is important to use labels to carefully distinguish your views from the author’s, so that you don’t confuse your reader.
Then, like other essays, you can end with a direct comment on the book, and tie together issues raised in the review in a conclusion.
There is, of course, no set form, but a general rule is that the first one–half to two–thirds of the review should summarize the author’s main ideas and at least one–third should evaluate the book.What is the most important part of a book review?
| A．The heading. | B．The evaluation. |
| C．The conclusion. | D．The introduction. |
It can be confusing to readers if _____ .
| A．there is no heading in a book review |
| B．the book has achieved its goal |
| C．the viewer’s point of view is not distinguished from the author’s |
| D．the book is compared with others on the same subject |
What is NOT suggested for a book review in this passage?
| A．Quoting from the author of the book. |
| B．Providing some book information. |
| C．Analyzing only the author of the book. |
| D．Comparing the book with others of a similar subject. |
The best title for this passage is “ _____”.
| A．Steps to follow |
| B．Tips for writing a book review |
| C．The way to develop your idea |
| D．Things not to be avoided in a book review |
Last Thursday, Michael and Linda stood behind large food trucks distributing meals to 4,000 homeless people for their wedding reception on the border town of Kilis. The couple had decided that instead of hosting their friends and family for a traditional feast reception, they would feed the victims from an earthquake-stricken area.
The idea came from the bridegroom's father, Ted, who volunteers for a Turkish relief organization. For the past few years, the organization has distributed daily meals to thousands of people who've suffered from natural disasters. He approached a representative of the organization and suggested that the family cover part of the costs of feeding them for the day.
Then he told his son, who was surprised by the suggestion, but soon won over. When he told that to the bride, she was really shocked but finally accepted because in southeastern Turkey there is a real culture of sharing with people in need. They love to share their food, their table and everything they have. And afterwards she was quite amazed about it. So, they arrived at the distribution center on Thursday to spend the day serving food and taking photographs with their grateful recipients（接受者）．
On Tuesday evening, the newly married couple were still pleased with their decision to quit a personal celebration for one with a greater good. "It's like sharing a dinner with your friends and family who have this kind of thing on a daily basis or sharing something with people who don't even have the most basic things," Michael said. "Hopefully, this will also give the start for other wedding dinners to be held here with our brothers and sisters in need."Why did so many people crowd in Kilis?
| A．To attend Michael and Linda's wedding. |
| B．To support the organization. |
| C．To escape the damaging earthquake. |
| D．To help distribute free daily meals. |
How did the couple celebrate their wedding?
| A．They treated their friends and relatives to a big dinner. |
| B．They shared their happiness with the homeless in Kilis. |
| C．They afforded the entire cost of the day for feeding victims. |
| D．They took photos with the grateful victims. |
What does the underlined word "approached" in Paragraph 2 mean?
| A．took in | B．moved towards |
| C．came across | D．consulted with |
We can know from the text that __________________..
| A．Kilis is a place which lies in southeastern Turkey |
| B．Ted was a representative of the organization |
| C．Linda adopted the suggestion immediately she heard it |
| D．Michael doubted if more new couples would follow him |
My students often tell me they don’t have “enough time” to do all their schoolwork. My reply is often brief –You have as much time as the president. I usually carry on a bit about there being 24 hours per day for everyone, and suggest that “not enough time” is not an acceptable explanation of not getting something done.
Once in graduate school, I tried to justify myself to one of my professors by saying that I was working. His answer to me was, “That’s irrelevant. What’s important is the quality of your work.” Since then I have had time to reflect on the “hard worker” dodge(伎俩), and I have come to some conclusions – all relevant to the issue of how much time we have.
If you look at the matter analytically, you can identify two parts of the problem. There is, of course, the matter of “time”, which we can think of as fixed. Then there is the issue of “work” during that time, which can vary in intensity. But, as my professor suggested, it’s not diligence but the quality of the product that is important.
That led me to a new idea, the quality of work. That concept is perhaps best explained by a sign I once saw on the wall in someone’s office – Don’t work harder but work smarter! There’s a lot of sense in that idea.
If you can’t get more time, and few of us can, the only solution is to improve the quality of work. That means thinking of ways of getting more out of the same time than we might otherwise get. That should lead us to an analysis of our work habits. Since “work” for students usually means “homework”, the expression “work habits” should be read as “learning habits”.
Then, as a smart student, you will seek to improve those skills that you use in study, chiefly reading and writing. If you learn to read better and write better, there are big benefits that pay off across the board in all your studies.From the passage, we know that the author is _____.
| A．a poet | B．an educator |
| C．an editor | D．a director |
We can infer from the first two paragraph that we students _____.
| A．have enough time |
| B．can meet the president |
| C．get something done well |
| D．should accept the explanation |
The underlined sentence in Paragraph 2 means _____.
| A．That is impossible | B．That is not important |
| C．That is unbearable | D．That is not acceptable |
The main purpose of writing the passage is to give _____.
| A．information | B．encouragement |
| C．criticism | D．advice |
Kompong Phhluk Private Tour
Depart the city for an unspoiled floating community called Kompong Phhluk which is astonishing for its stilted-house villages and flooded forest.
Stop on the way for the Rolous Market tour. This is a great chance for you to take the photos of locals selling vegetables, different fish species and other local produce.
After this market tour we’ll all have a boat trip to the floating community of Kompong Phhluk, visit an island pagoda, a school and houses standing on 8 or 10m high stilts, fish farms and learn about the village life.
Stop and have lunch in a family’s house before getting into a row boat and venturing into the flooded forest, the habitat to some famous water-bird species.
Eventually we jump back into the big boat and set off for the largest fresh water lake in SE Asia, Tonle Sap.
Tour Details
·Departs 8:30am
·Returns around 2pm
·A picnic lunch with sandwiches and drinks is provided. We cannot provide local food from the area due to poor sanitation（卫生）, lack of hygiene standards and refrigeration.
·No passes required
Rates
·These rates are based on an English speaking guide.
·Rates include all transport, water and a picnic lunch.
·Children 11 years and under are 50%.
·Children 4 years and below are free.
·If your group is larger than 5 people, please email us for the best rate.
Number of People Price Per Person
1 Person $65
2 People $45
3 People $40
4 People $35
5 People $32
What to Wear
·Please be mindful of your clothing and try to avoid anything too revealing.
·We strongly recommend a sunglasses, hat and sunscreen.
General Information
·This is a poor rural village, please be mindful of the environment.
· Please do not hand things out to villagers, for this contributes to creating a begging cycle and can create jealousy.
·We recommend heading to the toilet before you go on this trip as facilities are very basic.Kompong Phhluk is famous for its ______.
| A．local vegetables and different fish species |
| B．stilted-house villages and flooded forest |
| C．Rolous Market and an island pagoda |
| D．water-bird habitat and fish farms |
A private trip for two parents and a 3-year-old boy costs ______.
| A．$40 | B．$80 | C．$90 | D．$120 |
Which of the following is not included in the rates?
| A．A tourist guide. | B．Transport. |
| C．Drinks. | D．Local food. |
We can conclude from the passage that ______.
| A．the living standard in the village is quite low |
| B．the tourist facilities along the way are quite good |
| C．revealing clothes are appropriate in the hot weather |
| D．giving local children small gifts is strongly recommended |