题目
题型:不详难度:来源:
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.
答案
小题1:A
小题2:C
小题3:B
解析
核心考点
试题【CANBERRA(Reuters)—Australia’s kangaroos are genetically similar to humans and ma】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
SHANGHAI-Famed Chinese scientist Qian Weichang died here on Friday morning, saddening millions of his countrymen.
He was 98.
Qian, a pioneer in mechanics and applied mathematics in modern China, was one of the three famous "Qians" in China"s science and technology field. He was well known alongside Qian Xuesen, the father of China"s space program, and Qian Sanqiang, a nuclear physicist who oversaw the development of China"s nuclear program.
Wu Shuqing, former president of Peking University, said Qian was an internationally well-known scholar whose modesty and conduct has set a good example for following generations.
After learning about Qian"s death, millions of Chinese people offered their condolences (吊唁) online.
Many students from Shanghai University, where Qian was a former president, burst into tears after hearing the news, saying it was a great loss to the university and to China.
For those off campus for the summer vocation, many visited their university website, which had been turned gray. Some said they planned to return to the campus to mourn him.
Many of those still on campus voluntarily joined preparations for a mourning (哀悼) service that will begin at the university on Saturday.
The university has set up two mourning halls at two of its campuses and publicized the mourning time and phone numbers at the two sites.
Qian was born in Wuxi, Jiangsu, in 1912. Although he was initially not good at science, he chose to study physics at Tsinghua University because he believed science and technology were the keys to strengthening China in the 1930s.
He graduated from Tsinghua in 1935, and earned his PhD in applied mathematics from the University of Toronto in Canada in 1942.
He returned to China in 1946 and became a mechanics professor and later vice-president at Tsinghua University.
Qian made great contributions to the engineering applications of sciences, such as the fluttering of airplanes, armor penetration, the design of instruments and pipe systems.
He is an academician (院士) of the Chinese Academy of Sciences.
36. Qian Weichang used to work at ______.
A. Tsinghua University and Peking University
B. Shanghai University and Toronto University
C. Peking University and Shanghai University
D. Tsinghua University and Shanghai University
37. According to the passage, the students expressed their sadness to Qian"s death in the following ways EXCEPT that they ______.
A. held mourning meetings in the university
B. could not stop crying for losing him
C. went to the university to mourn him themselves
D. offered their help to the mourning service
38. The passage tells us that ______ made Qian Weichang aim at science in his university time.
A. his talents at study
B. his failures at science
C. the family"s expectation
D. his love to the country
39. Which of the following statements is WRONG according to the passage?
A. Qian Weichang graduated from Tsinghua University.
B. Qian Weichang used to work side by side with Qian Xuesen and Qian Sanqiang.
C. Qian Weichang spent at least four years studying and living abroad.
D. Qian Weichang was not good at science before he went to university.
40. What is the best title of this passage?
A. Respected Scientist Passes on at 98
B. The Great Life of the Scientist-Qian Weichang
C. The Whole Nation Mourn Qian Weichang
D. A 98-year Old Man Passed in Shanghai
NEW YORK---One in five U.S. workers regularly attends after-work drinks with coworkers, where the most common mishaps range from badmouthing another worker to drinking too much, according to a study released on Tuesday.
Most workers attend so-called happy hours to bond with colleagues, although 15 percent go to hear the latest office gossip and 13 percent go because they feel necessary, said the survey conducted for CareerBuilder. com, an online job site. As to what happens when the after-work drinks flow, 16 percent reported bad-mouthing a colleague, 10 percent shared a secret about a colleague and 8 percent said they drank too much and acted unprofessionally. Five percent said they had shared a secret about the company, and 4 percent confessed to singing karaoke. While 21 percent of those who attended said happy hours were good for networking, 85 percent said attending had not helped them get closer to someone higher up or get a better position. An equal number of men and women said they attended happy hours with co-workers, with younger workers aged 25 to 34 most likely and workers over 55 least likely to attend. Overall, 21 percent of workers attend happy hours with co-workers and; of those nearly a quarter go at least once a month.
The survey was conducted online by Harris Interactive on behalf of CareerBuilder. com among 6,987 full-time employees between February 11 and March 13. Harris Interactive said the results had a sampling error of plus or minus 1.2 percentage points.
56. Harris Interactive made the survey to find out .
A. how U.S. workers spend their after-work time
B. what U.S. workers do at after-work drinks
C. the relationships between U.S. workers
D. who are most likely to attend after-work drinks
57. of workers who attend after-work drinks speak ill of a colleague.
A. 4 percent B. 8 percent C. 16 percent D. 10 percent
58. According to the passage, most of those surveyed believed attending after-work drinks .
A.benefited them a lot B. could provide information
C.only made them relaxed D. was of no help to them
59. We can learn from the text that .
A. workers over 55 don’t like to attend happy hours at all
B. about 75% of workers go more than once a month
C. 10.5% of male workers attend happy hours with co-workers
D. about 700 workers surveyed shared a secret about a co-worker
60. After the survey, it can be inferred that .
A. all the workers oppose after-work drinks
B. the workers may change their attitudes towards after-work drinks
C. all the workers support after-work drinks
D. all the workers are suggested going to attend after-work drinks
Reports from Chinese want close ties between China and the US and Western Europe. A group of top Chinese scientists start in ten-nation tour next month.
Here in Miami, the mayor is still meeting with the leaders of the Teachers’ Union to try to find a way to end the strike. City schools are still closed after two weeks.
In news about health, scientists in California report findings of a relationship between the drinking of coffee and the increase of heart disease among women. According to the report in the American Medical Journal (杂志), the five-year study shows this: Women who drink more than two cups of coffee a day have a greater chance of having heart disease than women who do not.
In sports, the Chargers lost again last night. The BBS beat them 1 to nothing. The Wingers had better results. They beat the Rifles 7 to 3. It was their first win of their last five matches. That’s the news of the Hour. And now back to more easy listening with Jan Singer.
小题1:To improve the ties between China and the US and Western Europe, China ______.
A.will send a group of Chinese scientists to visit the US and. Western Europe |
B.has expressed its strong wishes |
C.will send some scientists to visit the US only |
D.has given many reports to improve the ties |
A.a peaceful way will soon be found |
B.students can’t go into the school because the classrooms are locked |
C.students haven’t been to school for two weeks |
D.the teachers’ strike will last long |
A.no heart disease will be found if people don’t drink coffee |
B.no one should drink more than two cups of coffee a day |
C.the more coffee people drink, the more chance they’ll get to have heart disease |
D.women’s heart disease has something to do with their drinking coffee |
A.the results of the two matches |
B.the number of the teams which played last night |
C.how many wins the BBS has had altogether |
D.the Wingers played against the Rifles |
NEW YORK—America has been experiencing the longest economic increase in its history.Incomes have risen, unemployment has fallen, and cities such as New York are bursting with new office buildings.
But just a short walk from Manhattan"s skyscrapers, George Brown sits on the side-walk, cooking a lunch of rice and bits of fish over a can of cooking fuel.
Brown is homeless — one of the 2.3 million people in the US who end up on the street.
During the day, Brown collects aluminium cans and sells them for five cents a piece.At night, he sleeps on the street.
"I have been on the street about eight or nine years, something like that," said the 62-year-old former construction worker.
Brown admits he"s had problems with alcohol and has smoked cocaine.But he said he still wants a more stable housing arrangement.He could afford it just with the money he earns by collecting cans and small pieces of metal, if only truly low-income housing were available.
However, he sees no hope of finding affordable housing in New York.
With the strong economy and unemployment down, beautiful housing is being built to meet demand.
A US report shows rents in New York city rose more than 27 percent between 1984 and 1999, from US $549 to US $700 a month.
One of the side effects of the strong economy is that rents have been going up.
The majority of people who experience homelessness really just need some affordable housing help.
But few housing companies have been built for the poor.Many small apartments in the city now rent for US $1,500 a month or more.
Brown, the homeless New Yorker, said he has a daughter who lives in the city but he rarely sees her.She is angry about his drinking and won"t allow it in her house.
Smiling, he said he also has seven grandchildren whom he"d like to see more often.
"All I"ve got to do is clean up my act," he said.
小题1:What kind of life does George Brown lead?
A.Homeless and dangerous. |
B.Homeless and childish. |
C.Homeless and miserable (痛苦的). |
D.Homeless and sleepless. |
A.old Americans lead a hard life |
B.old Americans want to live alone |
C.American cities are crowded with poor people |
D.bad habits play a role in some poor people"s Life |
A.America is short of housing companies |
B.the poor can"t benefit from the increasing economy |
C.poor people in America will become rich |
D.housing companies will build more houses for the poor |
A.Society. | B.Science. | C.Economy. | D.Business. |
With leatherbacks threatened with extinction (灭绝), Playa Grande"s turtle museum was abandoned three years ago and now sits among a sea of weeds.And the beachside ticket office for turtle tours was washed away by a high tide in September."We do not promote that "as a turtle tourism destination anymore because we realize there are far too few turtles to please,” said Alvaro Fonseca, a park ranger (管理员).
Even before scientists found temperatures going up over the past decade, sea turtles were threatened by beach development, drift net fishing and Costa Ricans" interest in eating turtle eggs.Btu climate change may cause the most serious harm to an animal that has lived in the Pacific for 150 million years.
Sea turtles are sensitive to numerous effects of warming.They feed on reefs, which are dying in hotter seas.They lay eggs on beaches that are being covered by rising seas and more violent waves.
More uniquely their gender (性别)is determined, not by genes but by the egg"s temperature during development.Small rises in beach temperatures can result in ail-female populations, obviously problematic for survival.If the sand around the eggs hits30 degrees Celsius, the gender balance shits to females: at about 32 degrees they are all female.Above 34, you get boiled eggs.
On some nesting beaches, scientists are artificially cooling nests with shade or irrigation and trying to protect broader areas of coastal property from development to ensure that turtles have a place to nest as the seas rise.
小题1:Why does the resort: town stop promoting its turtle tourism?
A.It decides not to disturb the turtles" normal life. |
B.Tourists have lost interest in watching turtles. |
C.There are only very few turtles now. |
D.The turtle museum was destroyed by a high tide. |
A.The local"s eating habit. | B.Drift net fishing |
C.Beach development | D.Global warming |
A.are doing research on the sea rise. |
B.are moving turtles to new homes |
C.are protecting turtles" nests |
D.are getting rid of sea weeds. |
A.introduce a special kind of sea turtle |
B.explain the mystery of turtles" eggs |
C.show the dangers a certain kind of turtle is facing |
D.attract more visitors to a sea turtle museum |
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