CANBERRA(Reuters)—Australia’s kangaroos are genetically similar to humans and may have first evolved in China, Australian researchers said Tuesday.
Scientists said they had for the first time mapped the genetic code of the Australian marsupials(有袋类)and found much of it was similar to the genome for humans, the government backed Center of Excellence for Kangaroo Genomics said.
“There are a few differences, we have a few more of this, a few less of that, but they are the same genes and a lot of them are in the same order,”center Director Jenny Graves told reporters in Melbourne.
“We thought they’d be completely scrambled, but they’re not. There is great chunks of the human genome which is sitting right there in the kangaroo genome,” Graves said, according to AAP.
Humans and knagaroos last shared an ancestor at least 150 million years ago, the researchers found, while mice and humans separated and went in different ways from one another only 70 million years ago.
Kangaroos first evolved in China, but migrated across the America to Australia and Antarctica, they said.
“Kangaroos are hugely informative about what we were like 150 million years ago,” Graves said.
68.Where does the kangaroo first develop according the scientists?
A.In China. B.In America. C.In Australia. D.In Antarctica.
69.What does the passage mainly tell us?
A.How the Kangaroo first evolved. B.Kangaroo’ genetic code have been mapped.
C.Kangaroos’genes are close to humans’. D.Scientists did much research into Kangaroos.
70.What does the underlined word “scrambled” probably mean in the fourth paragraph?
A.Funny. B.Wrong. C.Curious. D.Right.
第三部分:阅读理解(共15小题;每小题2分,满分30分)
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。
Robby was 11 when his mother dropped him off for his first piano lesson. I prefer students to begin at an earlier age. Robby insisted that it had always been his mother’s dream to hear him play the piano, so I took him on as a student.
Robby tried and tried while I listened and encouraged him and gave him more instructions. But he just did not have any inborn ability.
I only saw his mother from a distance. She always waved and smiled but never came in. Then one day Robby stopped coming to our lessons. I thought about calling him but I guessed he had decided to try something else.
I was also glad that he stopped coming for the sake of my career. However, several weeks before the recital (演奏会) of my students, Robby came,telling me that he never stopped practicing and begged me to allow him to take part in. I agreed, but I made him perform last in the program, so I could save his poor performance through my “curtain closer”.
I was surprised when he announced that he had chosen one piece of Mozart’s. Never had I heard a piece of Mozart’s played so well by someone at his age. When he finished, everyone was cheering.
I ran up and put my arms around Robby in joy. “I’ve never heard you play like that, Robby! How could you do it?”
“Well, Miss Hondorf. Do you remember I told you my mom was sick? Actually she died this morning. She was born deaf, so tonight was the first time she could hear me play in heaven. I wanted to make it special. I knew I could.”
That night, Robby was the teacher and I was the student. He taught me so many important things about life.
36. Why did Robby stop coming to piano lessons suddenly?
A. He lost heart and believed that he would never make it.
B. His mother might had been seriously ill.
C. He thought that his teacher disliked him.
D. His mother died and he didn’t need to play any longer.
37. We can know from the passage that ________.
A. the writer thought that students shouldn’t begin playing the piano too early
B. the writer thought that Robby had given up his piano lessons
C. only by practicing at home did Robby learn to play well
D. no one else could play the piece of Mozart’s as well as Robby
38. The writer made Robby perform last because ______.
A. the one who performs last always performs very well
B. Robby asked the writer to do so
C. she wanted to do something to save a poor performance
D. Robby thought his mother would come at last
Is your schoolbag too heavy to bear? The e-schoolbag will free you from the weight.
It is said that e-schoolbags are going to be brought into use in Chinese middle schools soon.An experiment with several hundred e-schoolbags will begin in seven cities: Beijing, Shanghai, Dalian, Shenzhen, Chongqing, Taiyuan and Shijiazhuang.And the e-schoolbags are going to cover all over China if the experiment shows to be successful.In fact, the e-schoolbag should perhaps be called an e-notebook.It is a small hand-held computers for school students.
Heavy schoolbags have long been a serious problem for school students.The average schoolbag of middle school students weighs up to 5 kilos.But the e-schoolbag will change everything.It is much lighter than a usual schoolbag, weighing under 1 kilo.Also, it is no bigger than a usual book, but it can still hold all the things for study, such as a textbook, a notebook and exercise book.They could be made into chips that are as small as a stamp.The students can read the text page by page on the screen.They can still take notes using a special electronic pen.If they want to know the meaning or the pronunciation of a new word, or even e-mail their teachers, it’s just a press of a button.
In some foreign countries, it is becoming common.But it is hard to tell when people will receive this new form of study.Some say that e-textbooks can easily be broken, some say that it is not good to students’ eyesight to look at the screen for long.But only time will tell.
69.The e-schoolbag has many functions EXCEPT ________.
A.It can pronounce the words. B.It can send e-mails.
C.It can be used as a dictionary. D.It can phone somebody.
70.According to the passage, the e-schoolbags ________.
A.are not heavy as before but still large
B.are used as an experiment in Tianjin
C.are made of metal
D.are going to cover China if it shows to be successful
71.Which of the following statement is TRUE?
A.All the students in China will use this new schoolbag.
B.We can do a lot of work based on the programmes of the chips.
C.The e-notebooks are very perfect.
D.We will not make notes because the e-notebook can make all by itself.
Britain and other nations should be well on with the building of huge industrial complexes (工业园区)for the recycling of wastes within fifteen years. The word rubbish could lose its meaning because everything that goes into the dumps would be made into something useful. Even the most dangerous and unpleasant wastes would provide energy if nothing else.
The latest project is to take a city of around half a million inhabitants (居民) and discover exactly what raw materials go into and what go out. The aim is to find out how much of these raw materials could be provided if a plant for recycling waste was built just outside the city. This plant would recycle not only metal such as steel, lead (铅) and copper, but also paper and rubber as well.
Another new project is being set up to discover the best way of sorting and separating the rubbish. When this project is completed, the rubbish will be processed like this: First, it will pass through sharp metal bars which will tear open the plastic bags in which rubbish is usually packed; then it will pass through a powerful fan to separate the lightest elements from the heavy solids; after that rollers will break up everything that can be broken. Finally, the rubbish will pass under magnets (磁铁), which will remove the bits of iron and steel; the rubber and plastic will then be sorted out in the final stage.
The first full-scale (完全的) giant recycling plants are perhaps fifteen years away. Indeed, with the growing cost of transporting rubbish to more distant dumps, some big cities will be forced to build their own recycling plants before long.
64. The underlined phrase “be well on with…” (Para. 1) most probably means _______.
A. have completed what was started B. get ready to start
C. put an end to D. have achieved a great deal in
65. What is NOT mentioned as a part of the recycling process described in paragraph three?
A. Sharpening metal bars.B. Sorting out small pieces of metal.
C. Breaking up whatever is breakable. D. Separating lightest elements from the heavy ones.
66. What’s the main reason for big cities to build their own recycling plants?
A. To get raw materials locally. B. To deal with wastes in a better way.
C. To get iron and steel from those plants. D. To protect the environment from pollution.
67. The first full-scale huge recycling plants ______.
A. will be built fifteen years later
B. began to operate fifteen years ago
C. will probably be in operation in fifteen years
D. will probably take less than fifteen years to build
68. Thepassageismainlyabout_______.
A. acheapwaytogetenergyB. thelocationofrecyclingplants
C. newwaysofrecyclingD. theprobability ofcityenvironment
Millions of aircraft take off around the world every year. The skies they fly in seem limitless—miles of empty space. But, with the number of flights increasing each year, this emptiness no longer exists. Researchers in the world of aviation(航空)are worried about the increasing pressure on pilots and ground controllers. And increasing collisions, occurring at or near an airport, have called attention to the need for more aids(辅助设备)to aviation control.
People who travel the skies are not certain about air safety. A great deal of money is spent on new and bigger aircraft and airports to deal with the vast increase in passengers travelling by air. Only a small percentage of this money is spent on navigation(导航)and other aids. Actually, suitable electronic equipment has long existed, and many companies market safety aids designed to make it safer for aircraft to take off, fly any distance, and land, whatever the weather. Yet, there are two problems to be solved. The first is to get governments, airlines and airport officials to agree to basic levels of safety aids. The second problem is to find a way of meeting these basic requirements.
But no matter how well the equipment works, operators of the equipment still play an important role. Communications between pilots and ground controllers are extremely important to air safety. It is worth pointing out that the mishearing or misunderstanding of instructions in English and the use of another language, in an international conversation, have led to two recent aircraft accidents. A new type of instrument(仪器)called FLIGHTWATCH would help pilots prevent airport collisions. It would be particularly helpful near airports.
60. The increasing number of flights leads to the fact that ________.
A. flying is no longer limited in the sky
B. there is no empty space for aids to aviation control
C. piloting and controlling planes is getting more difficult
D. the pressure on the ground becomes greater
61. There is uncertainty about air safety because ________.
A. planes become bigger for the increasing number of passengers
B. money spent on electronic equipment is far from enough
C. suitable electronic equipment hasn’t been invented yet
D. it is dangerous for planes to take off or land
62. The underlined word “collisions” probably means ________.
A. accidents in which two planes hit each other
B. misunderstandings between pilots and ground controllers
C. quarrels among passengers
D. breakdowns of new types of instrument
63. It can be inferred from the passage that ________.
A. governments and officials have paid great attention to air safety
B. there should be more companies to sell new safety aids
C. English should be used in an international conversation
D. understanding between pilots and ground controllers should be improved
第三部分阅读理解(共20小题;每小题2分,满分40分)
Will it matter if you don't have your breakfast ? A short time ago , a test was given in the United States. People of different ages, from 12 to 83, were asked to have a test . During the test , these people were given all kinds of breakfasts , and sometimes they got no breakfast at all. Scientists wanted to see how well their bodies worked when they had different kinds of breakfasts.
The rules show that if a person eats a right breakfast , he or she will work better than if he or she has no breakfast. If a student has fruit , eggs, bread and milk before going to school ,he or she will learn more quickly and listen more carefully in class.
The result is opposite to what some people think . Having no breakfast will not help them lose weight . This is because they are so hungry at noon that eat too much for lunch . They will gain weight instead of losing it . You will lose weight if you reduce your other meals.
56. During the test , the people were given _________.
A. no breakfast at all B. different breakfast or sometimes none
C. very rich breakfast D. little food for breakfast
57. Scientists wanted to know whether __________.
A. breakfast had any effect on work and studies. B. people were interested in breakfast
C. breakfast did harm to people 's health D. people would work better without breakfast
58. According to the passage , some people think without breakfast they will ____
A. lose weight B. get a good result in their work
C. gain weight D. not be hungry at all.
59. Which of the following sciences is not right?
A. It is bad for your health to have no breakfast.
B. No breakfast and more lunch may make you fatter.
C. The more breakfast you have, the more quickly you will learn in class.
D. If you don't eat much for lunch and supper , you may lose weight.