Ocean Acidification: 'Evil Twin' Threatens World's Oceans
The rise in human emissions of carbon dioxide is driving dangerous changes in the chemistry and ecosystems of the world's oceans, international marine（海洋的）scientists have warned. "Ocean conditions are already more extreme than those experienced by marine organisms and ecosystems for millions of years," says the latest issue of the journal Trends in Ecology and Evolution. "This emphasizes the urgent need to adopt policies that markedly reduce CO2 emissions."
Ocean acidification, which the researchers call the 'evil twin of global warming', is caused when the CO2 emitted by human activity, mainly burning fossil fuels, dissolves into the oceans. It is happening independently of, but in combination with, global warming. Evidence gathered by scientists over the last few years suggests that ocean acidification could represent an equal -- or perhaps even greater threat -- to the biology of our planet than global warming. More than 30% of the CO2 released from burning fossil fuels, cement production, deforestation and other human activities goes straight into the oceans, turning them gradually more acidic.
"The resulting acidification will impact many forms of sea life, especially organisms whose shells or skeletons are made from calcium carbonate（碳化钙）, like corals and shellfish. It may interfere with the reproduction of plankton species which are a vital part of the food web on which fish and all other sea life depend," he adds.
The scientists say there is now persuasive evidence that mass extinctions in past Earth history, like the "Great Dying" of 251 million years ago and another wipeout 55 million years ago, were accompanied by ocean acidification, which may have delivered the deathblow to many species that were unable to cope with it. "These past periods can serve as great lessons of what we can expect in the future, if we continue to push the acidity the ocean even further" said lead author, Dr. Carles Pelejero, from ICREA and the Marine Science Institute of CSIC in Barcelona, Spain. "Given the impacts we see in the fossil record, there is no question about the need to immediately reduce the rate at which we are emitting carbon dioxide in the atmosphere," he said further.
"Today, the surface waters of the oceans have already acidified by an average of 0.1 pH units from pre-industrial levels, and we are seeing signs of its impact even in the deep oceans," said co-author Dr. Eva Calvo, from the Marine Science Institute of CSIC in Spain. "Future acidification depends on how much CO2 humans emit from here on -- but by the year 2100 various projections indicate that the oceans will have acidified by a further 0.3 to 0.4 pH units, which is more than many organisms like corals can stand," Prof. Hoegh-Guldberg says.
"This will create conditions not seen on Earth for at least 40 million years."
"These changes are taking place at rates as much as 100 times faster than they ever have over the last tens of millions of years" Prof. Hoegh-Guldberg says. Besides directly impacting on the fishing industry and its contribution to the human food supply at a time when global food demand is doubling, a major die-off in the oceans would affect birds and many land species and change the biology of Earth as a whole profoundly, Prof. Hoegh-Guldberg adds.
67. What is the biggest cause of the ocean acidification according to the report?
A. the increase of carbon dioxide emission by human beings
B. The worsening of global warming
C. The disappearance of the world’s forests
D. The decrease of marine life
68. In what way according to the report does ocean acidification affect the majority of marine life?
A. It affects their reproduction B. It destroys their food chain
C. It affects the growth of their young D. destroys their habitats
69. Which of the following statements is NOT true about ocean acidification?
A. Ocean acidification has made ocean conditions most extreme in millions of years.
B. Ocean acidification may do more damage than global warming to human and plant life in the long run.
C. Ocean acidification is suspected of having caused mass extinctions of life in past Earth history.
D. The effects of ocean acidification are not now but will be felt in the foreseeable future.
70. From the report we can clearly feel that the situation with ocean acidification __________.
A. is quite optimistic B. remains well under control
C. looks more than urgent D. is already out of control
The battle for the leadership of Britain’s Labour Party ended on September 25. Five candidates competed for the top job, but it turned out to be a tale of two brothers. Victory went to Ed Miliband, 40, with his elder brother David, 45, coming a close second. Ed’s Miliband’s job will now be to try to lead his party back into power and oppose Prime Minister David Cameron.
The two Milibands were both ministers in the Gordon Brown government. David Miliband, as Foreign Secretary, held the third most important post in UK politics. US Secretary of State Hillary Clinton described him as “vibrant and attractive”. Ed, who had a lesser role in government as Minister of Climate Change, was valued for his contribution to policy discussions and for his performance at the Copenhagen Conference on Climate Change last December.
The Miliband brothers were born to political parents. Their father, Ralph, was a Marxist scholar. He came to Britain from Belgium in 1940, fleeing the Nazis. Ralph Miliband was buried beside Karl Marx in London’s Highgate Cemetery. His wife Marion, the brothers’ mother, remains an active party member at 76.
The two brothers represent different wings of the Labour Party. David supported former Prime Minister Tony Blair; Ed was a follower of Blair’s great rival Gordon Brown, the last Labour PM.
“We’re determined to make sure that family comes before politics, and I don’t think there’s any chance that politics is going to get in the way,” David Miliband said before the vote.
After the result, the two embraced in front of the cameras.
In his acceptance speech, Ed Miliband said to his brother: “David, I love you so much as a brother. And I have such extraordinary respect for the campaign that you ran.”
But some feel their warm words were for the media and for the sake of party unity. There had been reports of anger on David’s part when his younger brother chose to stand against him. David may feel that the leadership was stolen from him-and by his own brother. Ed himself was reported to be concerned that he might have hurt David. According to the Guardian, after the result, Ed’s first reaction was: “what have I done to David?”
Ed suggested that he was prepared to make his brother shadow chancellor. But David has decided it is time to move on. He will not have a role in the Shadow Cabinet in the future.
In effect, he has fallen on his sword for the Party. David Miliband said the priority was to allow his brother to make a success of leading Labour: “I believe this will be harder if there is constant comparison with my comments and position as a member of the shadow cabinet.”. Ed Miliband became head of Britain’s Labour Party because ______.
| A．he played an important role in the previous British government. |
| B．his arguments at political discussions and his performance at an international conference |
| C．Hillary Clinton thought highly of him |
| D．his brother supported him both at home and politics. |
. According to the passage, which is NOT TRUE?
| A．Ed and David both worked in the government. |
| B．Ralph Miliband came to Britain because of the Nazis. |
| C．Tony Blair, Gordon Brown and David Cameron are all Labour Party Prime Ministers. |
| D．David Miliband and Ed Miliband’s mother is still alive. |
.What can be inferred from the passage?
| A．David Miliband and Ed Miliband fought against each other both at home and politics. |
| B．Ed was concerned about David’s feelings after the election. |
| C．David and Ed were born into a political family. |
| D．David and Ed agreed with each other on most of the issues |
.What does the underlined sentence mean?
| A．David accepted his brother’s invitation to be a shadow chancellor. |
| B．David was determined to fight against his brother. |
| C．David was so upset that he would end his life with a sword for the Party. |
| D．David refused his brother’s offer for him to be a shadow chancellor. |
.Which of the following can best describe the relationship between David and Ed?
| A．Brothers and political rivals | B．Partners in the political campaign |
| C．Partners in public and enemy in private | D．Representatives of different wings of Labour Party |
From the health point of view we are living in an amazing age. We are free from many of the most dangerous diseases. A large number of once deadly illnesses can now be cured by modern medicine. It is almost certain that one day medicines will be found for the most stubborn remaining diseases. The expectation of life has increased greatly. But though the possibility of living a long and happy life is greater than ever before, every day we witness the unbelievable killing of men, women and children on the roads. Man vs the motor-car! It is a never-ending battle which man is losing.
Thousands of people the world over are killed or horribly killed each year and we are quietly sitting back and letting it happen.
It has been rightly said that when a man is sitting behind a steering wheel(方向盘), his car becomes the extension of his personality. There is no doubt that the motor-car often brings out a man’s very worst qualities. People who are normally quiet and pleasant may become unrecognizable when they are behind a steering-wheel. They say, they are ill-mannered and aggressive, willful as two-year-olds and completely selfish. A.. their hidden angers and disappointments seem to be brought to the surface by the act of driving.
The surprising thing is that society smiles so gently on the motorist and seems to forgive his behavior. Everything is done for his convenience. Cities are allowed to become almost uninhabitable because of heavy traffic; towns are made ugly by huge car parks; the countryside is ruined by road networks; and the deaths become nothing more than a number every year, to be easily forgotten.
It is high time a world rule was created to reduce this senseless waste of human life. With regard to driving, the laws of some countries are unbelievable lenient(宽容的) and even the strictest are not strict enough. A rule which was universally accepted could only have an obviously beneficial effect on the accident rate. Here are a few examples of some of the things that might be done. The driving test should be standardized and made far more difficult than it is; all the drivers should be made to take a test every three years or so; the age at which young people are allowed to drive any vehicle should be raised to at least 21; all vehicles should be put through strict tests for safety each year. Even the smallest amount of alcohol in the blood can damage a person’s driving ability. Present drinking and driving laws(where they exist) should be made much stricter. Speed limits should be required on all roads. Governments should lay down safety specifications for car factories, as has been done in the USA. All advertising stress power and performance should be banned. These measures may not sound good enough. But surely nothing should be considered as too severe if it results in reducing the number of deaths. After all, the world is for human beings, not motor-cars. .What is the main idea of this passage?
| A．Traffic accidents are mainly caused by motorists. |
| B．Thousands of people the world over are killed each year. |
| C．The laws of some countries about driving are to lenient. |
| D．Only stricter traffic laws can prevent accidents. |
. What does the author think of society toward motorists?
| A．Society laughs at the motorists. | B．Huge car parks are build in the cities and towns. |
| C．Victims of accidents are nothing. | D．Society forgives their rude driving |
.What does the author mean by saying “his car becomes the extension of his personality” in Paragraph 2?
| A．Driving can show his hidden qualities | B．Driving can show the other part of his personality |
| C．Driving can bring out his character | D．Driving can represent his manners |
. Which of the following is NOT mentioned as a way against traffic accidents?
| A．Perfect the road network | B．Stricter driving tests |
| C．Test drivers every three years | D．Raise age limit and lay down safety specifications |
. The author’s attitude towards the traffic situation is ______.
| A．confused | B．discontented | C．appealing | D．doubtful |
You can tell a lot about a person from the clothes they wear, but you can also tell a lot about a person simply from the handbags they carry. It's hard to believe, but you can find out a number of things about a woman's personality just by looking at the type of handbag she sports. Below you will find a number of handbag styles and colors as well as what each specific type of handbag says about the owner.
Styles:
Under-the Shoulder – handbags which are smaller and fit tightly underneath the shoulder indicate class and sophistication. A women working in an upscale office or someone of high stature would choose this form of handbag.
Big and Bulky – Big, bulky and oversized bags are casual and are often associated with younger individuals. These are used for individuals who carry a number of things (binders, books etc) and require a lot of space. Down-to-earth, lower-maintenance women would carry this type of handbag.
Designer – Designer handbags often cost an arm and a leg and therefore are usually associated with high-maintenance females. Females who are confident and require top of the line accessories will settle for nothing less than a name-brand designer purse. Guys – watch out for these girls, they tend to be a handful.
Cigar Box Purses – A women who carries a cigar box purse likes to be unique and stand out from the crowd. These women have minds of their own and cannot be told what to do. They are comfortable in their own skin and tend to be very independent.
Leather with Buckles and Zippers – women who choose leather purses with lots of buckles and zippers are leashing out their wild sides. These women tend to act before they think and are always ready for a good time. The extra buckles and zippers tend to signify a "bad girl" image.
Colors:
Bright Colors – Bright colored handbags like pink, purple, bright blue and green indicate that the woman is fun, friendly and approachable. women who are out-going and sociable will tend to choose these colors. This is the type of woman who will strike up a conversation with a complete stranger.
Black and Brown – women who choose black or brown handbags tend to be more formal in manners and are often mistaken as being snobby or restricted. These types of handbags are often associated with down-to-earth women, who are shy at first, but open up after a while. They tend to exude a shy confidence, which is sometimes mistaken as someone who thinks she's better than others.
The style and color of your handbag says a lot about you. Choose your handbag very carefully and remember you can choose more than one style. You may feel like being reserved one day and the center of attention another…it's natural to want different things in life.. Who is likely to start a conversation with a complete stranger according to the passage?
| A．A woman with her handbag carried under the shoulder. |
| B．A woman carrying an oversized handbag. |
| C．A woman carrying a bright colored handbag. |
| D．A woman who chooses a black or brown handbag. |
.Women who choose leather purses with lots of buckles and zippers probably ______.
A. make careful decisions B. enjoy having fun
C. act in bad manners D. become bad girls
43. Which of the following can best describe women who choose black or brown handbag?
A. Reserved B. Friendly C. Wild D. Unique.A woman who carries a cigar box purse likes to ______.
| A．follow others’ steps | B．live a simple life | C．act to their own mind | D．work with others |
Traditional surgical procedures require surgeons to make large incisions（切口）in a patient’s body in order to gain access to the organs inside . It was once common for heart surgeons , who perform highly specialized and complex procedures , to make long incisions in a patient’s chest and then split the breastbone to reach the heart . Patients who undergo surgery are often at the risk of infection , as bacteria can infect the cut in the skin . In addition , there is often a lengthy recovery period .
A surgical technique known as “ keyhole surgery ” has become common in recent years . In general , the surgeon will make a couple of small incisions around the area where the operation is going to be performed . Tubes are pushed into the holes , and a tiny camera is put into the body . The camera is attached to a large monitor screen and the doctor can see it while performing the operation . In addition to the camera , doctors also push their tiny surgical instruments through the tubes . The awkward part of keyhole surgery is that it is counterintuitive ; that is to say , if a surgeon wants to move the tool to the left , he or she must push it to the right .
Another new machine called the “ Da Vinci Surgical System ” has been tested in hospitals in the US. Unlike keyhole surgery , this robot’s moving parts are designed to copy man’s hand and wrist movement , thus providing better control and sensitivity . Sitting at a console（控制台）a few feet from the patient , the surgeon can control the instruments by moving highly sensitive pads . The area of the body is enlarged on a screen , which gives surgeons a view similar to that of a traditional surgical procedure .
The Da Vinci Surgical System has been welcomed as revolutionary by many surgeons . Patients with serious illness must undergo major surgery , but the smaller incisions typically mean a shorter recovery time . On the downside , some operations have taken up to fifty minutes longer because surgeons are inexperienced at using the new technology . As surgeons become more familiar with the machines , the time needed for surgical procedures is likely to decrease .. What can be learned about the traditional surgery according to the passage ?
| A．Long incisions are made in a patient’s chest |
| B．It often takes a longer time to do an operation |
| C．The cost of the traditional surgery is very high |
| D．The incision is likely to be infected after the operation . |
. Which of the following is one disadvantage of keyhole surgery ?
| A．It requires the use of long , thin tools and a tiny camera |
| B．The doctors can not view the inside of the patients body clearly |
| C．The direction in which a doctor moves the surgical tools is opposite |
| D．A tiny camera has to be inserted into the patient’s body in advance |
. The Da Vinci Surgical System differs from keyhole surgery in that it __________ .
| A．requires that a surgeon make more small incisions on a patient |
| B．reduces the amount of time it takes to perform a surgical procedure |
| C．allows the surgeon to use the surgical instruments more sensitively |
| D．get rid of the need for surgeons to make Large incisions on patients |
. The passage mainly tells readers about __________ .
| A．the challenges brought about by new technology |
| B．the application of new technologies in modern surgery |
| C．the reflections on the development in medical science |
| D．the benefits and drawbacks of the Da Vinci Surgical System |
One thing the tour books don’t tell you about London is that 2,000 of its residents are foxes , which fled the city about centuries ago after developers and pollution moved in . But now that the environment is cleaner , the foxes have come home , one of the many wild animals that have moved into urban areas around the world .
Several changes have brought wild animals to the concrete jungles . First of all , air and water quality in many cities has improved as a result of the 1970s’ pollution control efforts . meanwhile , rural areas have been built up , leaving many animals on the edges of suburban areas . In addition , conservationists have created urban wildlife shelters .
“ The number and variety of wild animals in urban areas is increasing , ” says Gomez Jones . One of the country’s largest populations of raccoons now lives in Washington , D.C. , and moose are regularly seen wandering into Maine towns . Peregrine falcons（猎鹰）dive from the window edges of buildings in the largest U.S. cities to hunt for pigeons .
For peregrine falcons , cities are actually safer than rural areas . By 1970 the birds had died out east of the Mississippi because the DDT , a widely used poison to kill insects , had made their eggs too thin to support life . That year , Tom Cade began raising the birds for release in cities , for cities afforded abundant food in the form of pigeons and contained none of the peregrines’ natural enemies .
“ Before they died out , some migrated to cities on their own because they had run out of natural habitats , ” Cade says . “ To peregrines , buildings are just like natural habitats . ” He has released about 30 birds since 1975 in New York , Baltimore , Philadelphia and Norfolk , and of the 20 pairs now living in the East , half are originally born in the city . “ A few of the young ones have gotten into trouble by falling down chimneys and crashing into window glass , but overall their adjustment has been successful . ”. The first paragraph suggests that __________ .
| A．environment is vital for wildlife |
| B．tour books are not a reliable source of information |
| C．London is a city of fox |
| D．foxes are highly adaptable to environment |
. The passage is mainly concerned with __________ .
| A．wildlife of all kinds returning to large cities to live |
| B．falcons in New York , Baltimore , Philadelphia , and Norfolk |
| C．moose running into glass doors of stores |
| D．foxes returning to London |
. The following statements about peregrine falcons are true EXCEPT __________ .
| A．They died out east of he Mississippi because of the side effect of DDT |
| B．They tend to jump down from a height to hunt for food |
| C．They like running into glass windows or chimneys |
| D．Most of them have got used to living in the concrete jungle |
. The second paragraph is trying to tell us __________ .
| A．that air and water quality has improved in the cities |
| B．why wildlife likes the noise and activities in the cities |
| C．that wildife refuges have been built in the cities |
| D．why wildlife is returning to cities |