Winter begins in the north on December 22nd. People and animals have been doing what they always do to prepare for the colder months. Squirrels (松鼠), for example, have been busy gathering nuts from trees. Well, scientists have been busy gathering information about what the squirrels do with the food they collect.
They examined differences between red squirrels and gray squirrels in the American state of Indiana. The scientists wanted to know how these differences could affect the growth of black walnut (黑胡桃) trees. The black walnut is the nut of choice for both kinds of squirrels. The black walnut tree is also a central part of some hardwood forests.
Rob Swihart of Purdue University did the study with Jake Goheen, a former Purdue student now at the University of New Mexico. The two researchers estimate that several times as many walnuts grow when gathered by gray squirrels as compared to red squirrels. Gray squirrels and red squirrels do not store nuts and seeds in the same way. Gray squirrels bury nuts one at a time in a number of places. But they seldom remember where they buried every nut. So some nuts remain in the ground. Conditions are right for them to develop and grow the following spring. Red squirrels, however, store large groups of nuts above ground. Professor Swihart calls “death traps for seeds”.
Gray squirrels are native to Indiana. But Professor Swihart says their numbers began to decrease as more forests were cut for agriculture. Red squirrels began to spread through the state during the past century.
The researchers say red squirrels are native to forests that stay green all year, unlike walnut trees. They say the cleaning of forest land for agriculture has helped red squirrels invade Indiana. Jake Goheen calls them a sign of an environmental problem more than a cause.The study done by Rob Swihart and Jake Goheen is to ________ .
| A．find out the living conditions for squirrels |
| B．do something to get rid of squirrels |
| C．learn squirrels’ influence on black walnut trees |
| D．save the forests in the American state of Indiana |
The difference between gray squirrels and red squirrels mainly lies in ________ .
| A．the way they gather the walnut |
| B．the place they store the walnuts |
| C．the time they have winter sleep |
| D．the place they have winter sleep |
When Professor Swihart says “death traps for seeds”, he actually means that ________ .
| A．nuts above the ground will not develop into plants |
| B．red squirrels eat more nuts than gray squirrels |
| C．gray squirrels and red squirrels will have severe fights |
| D．seeds can be traps for other animals in the forest |
According to the passage, which of the following is true?
| A．Gray squirrels do more harm to the forest than red squirrels. |
| B．Red squirrels and gray squirrels have helped the spread of walnut trees. |
| C．The cleaning of forest land benefits red squirrels directly. |
| D．The black walnut is equally attractive to both gray and red squirrels. |
Visitors worry that London is an expensive city but there really are so many things to do for
free in London from museums and galleries to free music and walking tours.
Art Galleries
Tate Modern and Tate Britain are exceptional national art galleries housing some of the finest artworks in the world. Tate Modern focuses on contemporary art while Tate Britain displays British Art from the sixteenth century to the present day.
Museums
All of London's major museums are free, but most offer some special exhibitions for a fee. My favorite is the Museum of London where you can learn the history of London from Roman times to today. Other great major museums are the British Museum, the V&A, the Science Museum, and the Natural History Museum. Oh, and I love the Geffrye Museum. And the Horniman Museum. Now I can't decide which is the best!
Many of London's major art galleries and museums are open in the evening and often have special evening events. This can be a great way to relax at the end of a busy day seeing the sights. The main London galleries and museums are air-conditioned so it can be a wonderful way to cool down in the height of summer in the city. Galleries and museums are not open late every night so here is a handy list to help you plan your days and evenings.
Royal Parks
Many people say the Queen Mary's Rose Gardens in Regent's Park is their favorite spot in London, and who am I to argue? I would also recommend St. James's Park as it offers one of the best views of Buckingham Palace. Hyde Park is enormous and includes the ever popular Diana Memorial Fountain and the Peter Pan Statue.
There are often free talks and guided walks in the royal parks so do check the What's On section of the Royal Parks website.
Changing of the Guard
No visit to London is complete without seeing this military tradition. The Queen's Guard in London changes in the Forecourt inside the gates of Buckingham Palace at 11:30am every day in the summer and every other day in the winter. Get there early and view the spectacle from outside the front gates.
53. The passage is intended to _________.
A. recommend some free scenic spots to tourists
B. help visitors save money while visiting Ireland
C. advise travelers how to choose art articles D. tell readers London’s wonderful history
54. If you visit some museums in London in the evening, you ________.
A. can see all the artworks free of charge B. have to endure the heat of the summer
C. need to pay admission for general exhibition
D. may have a chance to enjoy some special events
55. In order to watch Changing of the Guard in summer, visitors have to _________.
A. gain access to the front gates after 11:30 a.m.
B. pay a sum of money to enter the Royal Parks
C. arrive at Buckingham Palace before 11:30 a.m.
D. come through the gates of Buchingham Palace
Christmas bird – watching is popular in the U.S.A. When the holiday season comes, some Americans are likely to watch and count birds in the sky with great interest every day. This activity began in the early part of the last century. It has a one-hundred-year history. At that time, there was a so-called “holiday hunting” custom. In order to celebrate the holiday, the hunters went out to kill birds and beasts. By 1900, there were 27 bird lovers who decided to count birds instead of killing birds. Since then, Christmas bird-watching was held every year. It has been continued to the present.
There were 42000 people who took part in the bird-watching last Christmas, from December 16 the year before to January 3 next year. They were in the United States and Canada, central America, south America and the Caribbean, watching and counting birds in the sky. The whole viewing area was divided into 1600 points. Each birdwatcher was responsible for 25 meters, and was required to write down the types and quantities of birds within 24 hours.
A birdwatcher described what he had watched vividly in his diary—“ When I looked up, I saw a beautiful ‘landscape’ in the sky: Red-crowned cranes(丹顶鹤) were driving up in cunning wedges that split the air. They were so neatly arranged, coordinating their movements. I was excited and breathtaking. Interestingly, the “human” shape(人字行) always maintains 110° ” .
“Why do red-crowned cranes choose to use ‘human’ shape when flying in formation?” He continued, “In my opinion, there are four reasons: first, the ‘human’ shape can make red-crowned cranes use increasing air which is produced by each other’s wings when they are swinging in the sky. It can increase the glide time and save physical ability. Second, the ‘human’ shape will enhance communication among the birds. The orders and the relevant information issued by the lead bird can be conveyed to each member in this migratory group unimpeded, accurately, rapidly and conveniently. Third, such a formation will help to find the birds left behind because of feeling run down as fast as possible, so that the young, the weak, the sick birds can get everyone’s help and encouragement. Finally, the ‘human’ shape shows not only beauty but also unity. It can give enemies a deterrent.They will be terrified and did not dare to attack the birds.The migration security of the birds will be ensured.”
Environmental experts admired and evaluated Christmas bird-watching highly. They pointed out that it made perfect sense. On the one hand it could enhance the human awareness of environmental protection. On the other hand it could provide first-hand information on birds.
49．When did Christmas bird – watching begin?
A．Sometime during Christmas holiday. B．At the beginning of 20th century.
C．In the early 19 th century. D．Since there was Christmas Day
50．What do bird – watchers do when they are bird – watching?
A．They kill birds and beasts. B．They watch birds and beasts.
C．They watch and count birds. D．They look at the sky and write diaries.
51．The following are all reasons for red – crowned cranes flying in “human” shape except .
A．they can help each other and ensure their safety
B．they can communicate with each other in order to reduce tiredness.
C．they can make use of the air produced by each other’s wings.
D．they can look stronger in case they come across enemies
52．This passage consists of five paragraphs. Please arrange the five main ideas of the paragraphs in order of their appearance in the passage.
a. How the bird – watchers divided their watching task and what was done.
b. How Christmas bird – watching came into being.
c. Christmas bird – watching is of great importance environmentally and scientifically.
d. A Christmas bird – watcher watched and was amazed by red – crowned cranes.
e. Red – crowned cranes fly in “human” formation for quite good reasons.
A．a – b – c – d – e B．b – c – e – d – a C．b- a – d – e – c D．b – d – e – a – c
That little “a” with a circle curling around it that is found in E – mail addresses is most commonly referred to as the “at” symbol.
Surprisingly though, there is no official, universal name for this sign. There are dozens of strange terms to describe the "@" symbol.
Before it became the standard symbol for electronic mail, the "@" symbol was used to represent the cost of something or how heavy something is. For instance, if you purchased 6 apples, you might write it as 6 apples "@" $1.10 each.
With the introduction of e-mail came the popularity of the "@" symbol. The "@" symbol or the "at sign" separates a person's online user name from his mail server(服务器) address. For instance, joe@uselessknowledge.com. Its widespread use on the Internet made it necessary to put this symbol on keyboards in other countries that have never seen or used the symbol before. As a result, there is really no official name for this symbol.
The actual origin of the symbol remains a mystery. History tells us that the @ symbol came from the tired hands of the Middle Ages. During the Middle Ages before the invention of printing machines, every letter of a word had to be copied with great efforts by hand for each copy of a published book. The monks that performed these long, boring copying duties looked for ways to reduce the number of individual strokes (笔画) per word for common words. Although the word “at” is quite short to begin with, it was a common enough word in text and documents so that those monks thought it would be quicker and easier to shorten the word “at” even more. As a result, the monks changed the shape of “t” into a circle to surround “a”, thus leaving out two strokes in the spelling “t”.
45．Which of the following is the best title of the passage?
A．How “at” developed into @. B．How @ came into being.
C．How monks invented @. D．How people wrote the cost of something.
46．Who knows the origin of @?
A．Nobody B．Monks C．Apple buyers D．Internet users
47．Which is NOT the reason for the monks to spell “at” as @?
A．Though “at” is short, it was used very often.
B．The monks wanted to be quicker and easier with their copying.
C．The monks wanted to invent a new word.
D．Copying work was long and boring for them.
48．According to the paragraph , which is TRUE about the symbol of @ today?
A．When you are online, you must use the @ symbol.
B．Kittly 163.com@is an email address.
C．In countries where @ is used, governments have given it an official name.
D．It is likely to find the @ symbol on computer keyboards worldwide.
Wind is the great maker of waves. There are exceptions, such as the tidal waves, sometimes produces by earthquakes under the sea. But the waves most of us know are produced by winds blowing over the sea.Now before constructing an imaginary life history of a typical wave, we need to know certain physical things about it. A wave has height, from trough (low point)to crest (high point),and it has length—the distance from this crest to that of the following wave. The period of the wave means the time it takes for succeeding crests to pass a fixed point. None of these things stays the same— for all depend upon the depth of the water and many other matters.
The water that makes up a wave does not advance with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position. And it is fortunate that this is so, for if the huge masses of water that make up a wave actually moved across the sea, sailing would be impossible.
If we want to find the speed of a wave, we may use the following way:
Speeding="Wavelength×Frequency"
Here, wavelength is the distance between two high points (crests), frequency means the number of cycles per second.
41.What causes waves according to the passage?
A.Earthquakes and nothing else. B. Wind and volcanos.
C. Wind and earthquakes. D. Wind and water.
42.Which of the following is true according to the text?
A. The water of a wave moves away across the sea.
B. The water of a wave remains almost in the same place.
C. The water of a wave goes with the passing of the wave.
D. The length of a wave means the distance between crest and trough.
43.The underlined word “succeeding” means__________.
A. reaching an aim B. doing well C. following after D. taking place
44.If the speed of wave 1 is 100 cm/s, and its frequency 10;and the frequency of wave 2 is 300,while its speed is twice that of wave 1.Which of the following is true?
A. The wave-lengths of the two are equal.
B. The wave-length of wave 1 is 10 times longer than that of Wave 2.
C. The wave-length of wave 2 is longer than that of wave 1.
D. The wave-length of wave 1 is longer than that of wave 2.
Five thousand years ago, people thought that illnesses were the result of evil living in human bodies. They also believed that gods and superior spirits were punishing people through diseases. The practice of magic and witchcraft (巫术) was popular among many tribes, and charms (符咒) and images of gods to drive away the evil spirits were often used.
People also started using herbal(草药的) medicine and by trial and error (反复试验，不断摸索) learned how to cure stomachaches and fevers. They had a witch doctor in the community. He would treat people with simple herbal medicine and magic. Early medicine was practiced the way north tribal Indians did hundreds of years ago and the way some tribes practice it today.
The ancient Chinese believed that the body was ruled by two forces, which they called “yin” and “yang”. The body would become ill if one force overcame the other and the balance between them was changed. Acupuncture (针刺疗法) was the way to bring back the balance between the two.
Also sand painting was an important part of Navaho medicine. The medicine man paints loosely upon the floor of an earth-covered house, where the ceremony takes place, or on a buckskin (鹿皮) or a piece of cloth, by letting the colored sands flow through his fingers with control and skill.
Ancient Mesopotamians believed that diseases come either from an evil spirit or a physical problem, such as worms. The doctor would decide from which source the illness has come from and send the patient either to a herbalist or to a witch doctor.
Egyptians had a very advanced medicine. They would sometimes rely on the god’s power to receive healing, but they also treated illnesses and operated on minor health problems like snake bites. They sucked the blood from the wound and bound the affected limb to stop the poison from spreading.
66. The practice of magic and witchcraft was popular in ancient times because________.
A. people could avoid being punished by gods and superior spirits by doing this.
B. people thought they could avoid getting diseases in this way.
C. people believed the evil spirits could be driven away in this way.
D. people often got diseases and this way was very effective.
67. How many places are mentioned where early medicine existed in the passage?
A. Three. B. Four.C. Five.D. Six.
68. From Paragraph 2 we can learn that ________.
A. people can cure lots of diseases by combining herbal medicine and magic.
B. herbal medicine is so effective that it can cure all kinds of diseases.
C. witch doctors treated people only with herbal medicine.
D. people tried lots of times to cure illnesses with herbal medicine.
69. Ancient Chinese people believed that ________.
A. diseases were the result of evil living in human bodies.
B. people would fall ill if the balance in human bodies was disturbed.
C. a medicine man could cure people’s diseases by sand painting.
D. diseases not only came from evil spirits but also were physical problems
70. The passage mainly tells us ________.
A. why ancient people became ill.
B. about the most advanced medicine in ancient times.
C. about the development of herbal medicine.
D. how ancient people cured their diseases.