1 . The driver who cuts you off in traffic.The neighbors who don't pick up after their dog.Situations such as these get our hearts racing and send our stress levels skyrocketing.Anger isn't a pleasant feeling.Some of us bottle up the emotion, while others explode in a wild rage (狂怒).Both habits do considerable harm to our bodies, our minds, and our relationships.
“Anger may fee1 uncomfortable and a lot of people think they have to get rid of their anger," says Patrick Keelan, a registered psychologist in Calgary, Alberta.“But anger is an emotion built into us to signal that something needs to be addressed.When we take notice of that signal and actually wrestle with the problem instead of turning a blind eye to it, we' re usually much better for it.”
Unfortunately, many of us have been conditioned to keep our emotions hidden.Increasingly,research is suggesting that this can have long-term effects on our health.Investigators at the University of Rochester noticed that people who contain their emotions tend to live shorter lives.When we're angry, stress hormones are released, which can make us more likely to develop a wide range of diseases, including diabetes, depression, immune related conditions.
Is it better, then, to scream and howl whenever something makes you mad? That's probably the reason why“rage rooms" have popped up in many American cities, where folks are invited to let steam off by violently smashing (打碎) stuff in a“safe" environment.However, the research indicates that when people display anger aggressively, it can actually increase the intensity of the anger -- and increase the likelihood of aggressive actions in the future.It doesn't take much imagination to predict how such behavior can affect your relationship with your spouse, your kids, or your colleagues.It also hurts your health.A large 2016 study at McMaster University found that people are more than twice as likely to have a heart attack after an angry explosion.
If we shouldn't bottle up our angry feelings but aggressive behavior isn't healthy either, how should we handle things that tick us of? It's the extreme highs and lows that cause the damage.If you're able to apply techniques that smooth out some of those peaks and valleys, you can have a gentler ride.
1. What does the underlined phrase“bottle up" in paragraph 1 mean?| A．Build up. |
| B．Hold back. |
| C．Let off. |
| D．Bring out. |
| A．Uncomfortable and avoidable. |
| B．Terrible and threatening. |
| C．Confusing and complex. |
| D．Normal and natural. |
| A．It leads to people's depression. |
| B．It warns people against violence. |
| C．It adds to people's anger. |
| D．It helps people to calm down. |
| A．Possible causes of anger. |
| B．Tips on handling anger. |
| C．Possible harm of anger. |
| D．Tips on avoiding anger. |
2 . Rescue workers had collected 820 birds from the Gulf of Mexico oil spill, the majority of them already dead. The current spill promises to be the largest in US history, and as cleanup efforts stretch across the summer, it's clear that more oiled birds will be found, stuck and suffering in the black stick liquid. And as they do with every oil spill, rescue workers will go to great lengths to capture and clean the survivors hoping to restore them to their natural habitat.
Is it worth the effort? Some scientists aren’t so sure. Because the stress of being captured and bathed is as significant as the horror of being immersed in oil, and because research suggests that many rescued birds die shortly after being released, some experts say euthanasia (安乐死) is a more humane option.
Clean bird feathers repel water (防水) and regulate body temperature while dirty ones don't. Oil in particular makes feathers heavier and decreases their ability to trap air, which in turn makes birds weak and become easier to drowning, overheating and organ damage. Of course, being captured and cleaned is no picnic either. Some birds wind up returning to their destroyed habitats only to fall victim to the oil again. And those who manage to avoid a second oil bath suffer dramatically shortened life spans (跨度) and lower reproductive success. Of the thousands of birds that were rescued from the Prestige oil spill off the coast of Spain in 2002, only 600 were released into the wild; most of the rest died after just a few days in captivity.
However, bird rescuers say they have learned a lot about how to best help oil-soaked birds, and that therefore, survival rates stand to increase this time around. In the past, birds were cleaned right away, and volunteers often worked through the night bathing rescued birds. But now, captured birds are left to rest for a day or two before being cleaned, and only washed during the day, so as not to disrupt their circadian (生理的) rhythms. But part of that increase may be due to greater selectivity on the part of rescuers. The workers do blood tests right in the field now and birds that are loaded with hydrocarbons (碳氢化合物) or don’t look like they’re going to make it are put down right away, rather than subjected to the stress of captivity and cleaning.
And so far, while release rates may be improving, there is little evidence of better medium or long-term survival, especially for the more-difficult-to-save species. There still aren’t good protocols (协议) for repairing the internal organ damage. Anyway, rescue efforts will continue in large part because the public demands that. Euthanasia is a difficult thing to do, especially for people who have built their lives around saving animals.
1. Why do some scientists doubt the effort to rescue oiled birds?| A．Because it has cost too much time and money. |
| B．Because human may be infected with the bird virus. |
| C．Because it is torture followed by death to birds. |
| D．Because migrant birds may broaden the pollution. |
| A．thousands of birds were polluted by oil |
| B．the survival rate of oiled birds was very low |
| C．the efforts to rescue oiled birds were ineffective |
| D．captivity is an impractical method to rescue binds |
| A．Oiled birds are kept in warm water for one or two days |
| B．The second cleaning of the oiled birds in daytime is not permitted |
| C．The rescuers often select the birds that are likely to survive |
| D．Hydrocarbons are removed to rescue the oiled birds |
| A．Oiled birds’ internal organ damage is permanent. |
| B．Euthanasia is a difficult and heart-aching operation. |
| C．The more-difficult-to-save species will die by cleaning. |
| D．The rescue is oiled birds’ suffering while seeing them die is cruel. |
3 . AIDS may be one of the most undesirable diseases in the world. Luckily, there is now hope for AIDS patients.
According to a recent paper published in the New England Journal of Medicine，Chinese scientists have successfully used CRISPR technology -a method of gene editing-to treat a patient with HIV. While it may not have cured the patient fully, it still represents a huge step forward in fighting the disease.
The patient was a 27-year-old Chinese man who was diagnosed with both AIDS and acute lymphoblastic leukemia (淋巴母细胞白血病), a type of blood cancer. Despite his bleak situation, doctors offered him a little hope: a bone marrow (骨髓) transplant to treat his cancer and an experimental treatment for his HIV. They used this chance to edit the DNA in bone marrow stem cells (干细胞) from a donor before transplanting the cells into the patient.
Specifically, the treatment involved using the gene-editing tool CRISPR-Cas9 to delete a gene known as CCR5, which encodes (给…编码) a protein that HIV uses to get inside human cells. Without the gene, HIV is unable to enter cells. Talking about the gene, lead scientist Deng Hongkui told CNN, “After being edited, the cells and the blood cells they produce have the ability to resist HIV infection.” Nineteen months after the treatment, the patients leukemia was in complete remission( 缓 解 ) and donor cells without CCR5 remained, according to the research paper.
Though the transplant didn't cure the man’s HIV, it still showed the effectiveness of gene-editing technology, as there was no indication of any unintended genetic changes-a major concern with past gene-editing treatment experiments. Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security in the United States, who was not involved in the study, praised the treatment. “They did a very creative experiment, and it was safe,” he told Live Science. “It should be viewed as a success.”
Deng believes gene-editing technology could “bring a new dawn” to blood related diseases such as AIDS and sickle-cell anaemia ( 镰 状 细 胞 贫 血 ). “Thanks to this new technology, the goal of a functional cure for AIDS is getting closer and closer,” he said.
1. The underlined word “bleak” in Paragraph3 probably means “______”.| A．hopeless |
| B．unstable |
| C．embarrassing |
| D．unique |
| A．By identifying and killing HIV. |
| B．By changing the structure of HIV. |
| C．By preventing HIV entering cells. |
| D．By removing a protein HIV feeds on. |
| A．Gene-edited cells are able to resist HIV infection. |
| B．The number of cells infected by HIV has decreased. |
| C．CCR5 and other genes in the patient's cells are changed. |
| D．Unintended genetic changes have taken place in the patient's cells. |
| A．It pointed out the problems of gene treatment. |
| B．It provided a new way to cure AIDS patients fully. |
| C．It could offer a safe treatment for blood-related diseases. |
| D．It was the first example to use gene-editing tool to treat AIDS. |
4 . “Birds” and “airports” are two words that, paired together，don’t normally paint the most harmonious picture. So it really raises some eyebrows when China announces plans to build an airport that is for birds.
Described as the world’s first-ever bird airport, the proposed Lingang Bird Sanctuary(保护区）in the northern coastal city of Tianjin is, of course,not an actual airport. Rather，it's a wetland preserve specifically designed to accommodate hundreds-even thousands-of daily takeoffs and landings by birds traveling along the East Asian-Australian Flyway. Over 50 species of migratory (迁徙的）water birds，some endangered, will stop and feed at the protected sanctuary before continuing their long journey along the flyway.
Located on a former landfill site，the 150-acre airport is also open to human travelers.(Half a million visitors are expected annually.) However，instead of duty-free shopping，the main attraction for non-egg-laying creatures at Tianjin’s newest airport will be a green-roofed education and research center, a series of raised “observation platforms” and a network of scenic walking and cycling paths totaling over 4 miles.
“The proposed Bird Airport will be a globally significant sanctuary for endangered migratory bird species, while providing new green lungs for the city of Tianjin.” Adrian McGregor of an Australian landscape architecture firm explained of the design. Frequently blanketed in smog so thick that it has shut down real airports, Tianjin is a city---China’s fourth most populous----that would certainly benefit from a new pair of healthy green lungs•
1. The underlined phrase “non-egg-laying creatures” in Paragraph 3 refers to?| A．Visitors. | B．Designers. |
| C．Endangered water birds. | D．Planes. |
| A．People cannot watch birds up close here. |
| B．It is located on a 150-acre landfill site. |
| C．It functions as an actual airport and a wetland preserve. |
| D．It provides migratory birds with food and shelter. |
| A．The airport will become a permanent home for birds. |
| B．Tianjin will win worldwide fame in the future. |
| C．Tianjin’s air quality will improve thanks to the airport. |
| D．Tianjin will be able to accommodate more people. |
| A．Airports shut down and open up. |
| B．China is to open the first Bird Airport. |
| C．Airports turn into green lungs. |
| D．Birds are no longer enemies to airports. |
5 . A 16-year survey on the arctic Norwegian island of Svalbard found the reindeer（驯鹿）there have declined in weight by an alarming 12 percent. The reduction in average body-mass is being blamed on global warming.
In research presented lately at a meeting of the British Ecological Society in Liverpool, scientists will explain how rising temperatures are making female reindeer difficult to obtain nutrients during important periods of being pregnant.
Snow in Svalbard typically covers the ground for eight months of the year, which, combined with low temperatures, limits grass growth to June and July. But as summer temperatures have increased by around 1.5℃, grasslands have become more productive, allowing female reindeer to gain more weight by the autumn and therefore to conceive（孕育）more calves.
However, warmer winters have brought with them greater rainfall which freezes when is settles on the snow, therefore locking out the reindeer from the life-supporting food below. As a result, female reindeer are becoming starved, causing them to give birth to much lighter young. The average mass of an adult reindeer in 1998, when the survey began, was 55kg, but by 2016 IT had dropped to 48kg.
Professor Steve Albon, an ecologist at the James Hatton Institute in Aberdeen , said that, because the mammals have a relatively high surface-area-to-volume ratio（表面积与体积比）, they are no particularly energy efficient.
Reindeer can often access the inadequate food sources beneath the snow by clearing IT away with their antlers（鹿角）, but they cannot break through the hard ice. Without access to the food in winter, calves are being born far lighter than they should be. Numbers of reindeer have also increased rapidly in the past 20 years, meaning that those which are born are facing greater competition for food. “The implication（含义）are that there may well be more smaller reindeer in the Arctic in the coming decades, but possibly at the risk of catastrophic die-offs because of increased ice on the ground,”said Professor Albon Despite the gloomy findings, reindeer appear to be suffering less from the impact of climate change than some other arctic species.
1. Which of the following may be the most important reason for the smaller reindeer?| A．Heavy snow. |
| B．Greater rainfall. |
| C．Hard ice. |
| D．Global warming. |
| A．grass growing more rapidly in summer |
| B．more rainfall in the arctic area in winter |
| C．female reindeer’s gaining more weight in winter |
| D．female reindeer’s suffering from hunger in winter |
| A．Exciting. |
| B．Optimistic. |
| C．Disappointing. |
| D．Doubtful. |
| A．By analyzing the research. |
| B．By classification of reindeer. |
| C．By comparing opinions of experts. |
| D．By telling stories of different species. |
