更多"Chocolate to Live For! A study pub"的相关试题:
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Chocolate to Live For!
A study published in the Journal of the American Medical Association in 2003 reported that dark chocolate may lower your blood pressure. Researchers at the University of Cologne studied men and women who were recently diagnosed with mild high blood pressure. Half were given 100g (fabout 3.5 ounces) of dark chocolate per day and half were given white chocolate. After only two weeks systolic (收缩的) blood pressure decreased on average by five points and diastolic (以及舒张的) blood pressure by two points in those consuming dark chocolate, but not those consuming white chocolate.
In a similar study, researchers from Italy reported in the American Heart Association journal Hypertension that 3.5 ounces of dark chocolate for one week lowered systolic blood pressure by 12 points and diastolic blood pressure by 8.5 points when blood pressure was monitored continuously for 24 hours. Insulin (胰岛素) sensitivity and LDL cholestero
A. They were all diagnosed with very high blood pressure before they joined the study.
B. They were given 100g of dark chocolate every day for two weeks.
C. Those who had taken dark chocolate had a decrease of systolic blood pressure.
D. All the participants had a decrease of systolic blood pressure and diastolic blood pressur
[单项选择]A newly published AIDS study could open another front in the battle against HIV infection by showing that gene therapy can be used to stop infected cells from spreading the deadly virus, researchers said.
In a test-tube experiment believed to be the first of its kind, researchers based at Children’s Hospital of Philadelphia were able to block the operation of the "tat" gene that allows HIV to spread throughout the body from infected cells.
Up to now, genetic AIDS research has concentrated on finding ways to help healthy cells withstand the ravages of the HIV virus that infects an estimated 16,000 new victims a day, mainly in the developing world.
But by working with human cells already infected with HIV, the team was able to reduce the tat gene’s virus-replicating functions by 80 percent to 90 percent, according to findings published in the journal Gene Therapy.
That, researchers said, raises the possibility of a new gene therapy approach capable of suppleme
A. AIDS study raises hopes for gene therapy treatment.
B. A new killer of HIV virus.
C. Research on gene therapy.
D. Gene therapy proves to be the ultimate solution to HIV infection.
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A study published in the New England Journal of Medicine estimated that there are an average of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not grave; fainting, dizziness and hyperventilation (换气过度) are the most frequent complaints. But 13% of them—roughly four a day—are serious enough to require a pilot to change course. The most common of the serious emergencies include heart trouble (46%), strokes and other neurological problems (18%), and difficult breathing (6%).
Let’s face it: plane riders are stressful. For starters, cabin pressures at high altitudes are set at roughly what they would be if you lived at 5,000 to 8,000 feet above sea level. Most people can tolerate these pressures pretty easily, but passengers with heart disease may experience chest pains as a result of the reduced amount of oxygen flowing through their blood. Low pressure can also cause the air in body cavities to expand—as much as 3
A. 13%
B. 46%
C. 18%
D. 6%
[单项选择]Hillman’s study, which will be published later this year, isn’t definitive enough to stand alone. But it doesn’t have to: it’s part of a recent and rapidly growing movement in science showing that exercise can make people smarter. Last week, in a landmark paper, researchers announced that they had coaxed (耐心谨慎地摆弄) the human brain into growing new nerve cells, a process that for decades had been thought impossible, simply by putting subjects on a three -month aerobic - workout regimen (养生之道). Other scientists have found that vigorous exercise can cause older nerve cells to form dense, interconnected webs that make the brain run faster and more efficiently. And there are clues that physical activity can stave off the beginnings of Alzheimer’s disease, ADHD and other cognitive disorders. No matter your age, it seems, a strong, active body is crucial for building a strong, active mind.
What is the main idea of the paragraph
A. Exercising can cause a chain of chemical reactions in the brain.
B. Exercising is helpful building a strong, active mind.
C. Exercising is a good way to keep fit and stay healthy.
D. Exercising can help the brain grow new nerve cells.
[单项选择] A recent study, published in last week’’s Journal of the American Medical Association, offers a picture of how risky it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone. By contrast, the risk of death for drivers between 30 and 59 decreases with each additional passenger.
The authors also found that the death rates for teenage drivers increased dramatically after 10 p.m., and especially after midnight. With passengers in the car, the driver was even more likely to die in a late-night accident.
Robert Foss, a scientist at the University of North Carolina Highway Safety Research Center, says the higher death rates for teenage drivers have less to do with "really stupid behavior" than with just a lack of driving experience. "The basic issue" he says. "is that adults who are responsible for issuing licenses fail to recognize how complex and skilled a ta
A. Teenagers should spend more time learning to drive.
B. Driving is a skill too complicated for teenagers to learn.
C. Restrictions should be imposed on teenagers applying to take driving lessons.
D. The licensing authorities are partly responsible for teenagers’’ driving accidents.
