单选题Colds are very common. The symptoms of the common cold include a sore throat, runny nose, stuffed-up nose, and tiredness. Colds are caused by viruses, but scientists cannot explain the exact cause. There is no cure. Many people, however, believe that they know the causes of and cures for the common cold. For example, they believe that it is possible to get a cold if we get chilled, if we get extra tired, or if we are too close to a person with a cold. In other words, if we want to prevent catching cold, we should stay warm and dry; we should avoid getting too tired, and we should not be in close contact with people who have colds. Meanwhile, there are probably hundreds of " cures" throughout the world for the common cold. For example, the following suggestions are popular in quite a number of societies : (1) drink plenty of water; (2) get extra rest; (3) take a lot of vitamin C; (4) take aspirin; (5) keep warm. Each year people spend a lot of money on cold medicines-pills, liquids, lozenges (含片). But these medicines do not cure colds; they can only relieve cold symptoms. In other words, they make us feel better.

单选题Professor Lin's {{U}}dedication to{{/U}} teaching earned him the respect of both his colleagues and students.

单选题It's tough finding a job these days. A. impossible B. difficult C. lucky D. easy

单选题 Stress Level Tied to Education Level People with less education suffer fewer stressful days, according to a report in the current issue of the Journal of Health and Social Behavior. However, the study also found that when less-educated people did suffer stress it was more severe and had a larger impact on their health. From this, researchers have concluded that the day-to-day factors that cause stress are not random. Where you are in society determines the kinds of problems that you have each day, and how well you will cope with them. The research team interviewed a national sample of 1,031 adults daily for eight days about their stress level and health. People without a high school diploma reported stress on 30 percent of the study days, people with a high school degree reported stress 38 percent of the time, and people with college degrees reported stress 44 percent of the time. "Less advantaged people are less healthy on a daily basis and are more likely to have downward turns in their health," lead researcher Dr. Joseph Grzywacz, of Wake Forest University Baptist Medical Center, said in a prepared statement. "The downward turns in health were connected with daily stressors and the effect of daily stressors on their health is much more devastating for the less advantaged." Grzywacz suggested follow-up research to determine why less-educated people report fewer days of stress when it is known their stress is more acute and chronic. "If something happens every day, maybe it's not seen as a stressor," Grzywacz says. "Maybe it is just life."

单选题But {{U}}in the end{{/U}} he approved of our proposal. A. undoubtedly B. certainly C. ultimately D. necessarily

单选题Insurance Whole life is permanent insurance protection that protects you for your whole life, from the day you purchase the policy until you die, as long as you pay the premiums (保险费). Whole life can be a solid foundation. Upon this foundation you can build a long-term financial plan, because it guarantees lifetime protection for your family or business. Whole life insurance provides basic insurance protection, plus Mortgage protection, Estate preservation, Retirement funding, Charitable giving, Business needs... A life insurance agent will help you determine an amount of insurance needed to protect your family or business in the event of your death. Generally after the first year, the policy begins to increase cash value. The amount of cash value in your policy usually increases every year. This money can be used to help purchase a home, fund a child's education, add to retirement income, or for any other purpose. You may also choose to leave it in the policy and allow it to grow. A whole life policy can earn dividends. Dividends are determined by the company's board of directors each year and are not guaranteed. When a dividend is payable, you may choose to take it in cash, use it to buy more insurance or to pay or reduce your premiums. When you die, the company will pay your beneficiaries the death benefit, usually the face amount of the policy plus any dividend. This money is generally received by the beneficiaries free from income tax.

单选题Stem Cell Therapy May Help Repair the Heart According to scientists in the USA, stem cell therapy may one day be able to repair the hearts of people with heart failure. Researchers at Pittsburgh University School of Medicine examined 20 patients who had severe heart failure and were going to have surgery. They injected stem cells into the parts of their hearts that were damaged. They then compared their hearts with those of people who had undergone surgery without having the stem cells injected into them (they had also suffered from severe heart failure). The patients who had the stem cells injected had hearts that were able to pump (用泵抽水) more blood than the others. According to Professor Robert Kormos, one of the researchers, these results could revolutionize heart treatment. Although previous studies had indicated that there might be a benefit, this is the first study that has actually proved that stem cell therapy can help the failing heart work better. All the patients in this study had hearts that could not pump blood properly. The scientists measured their ejection fraction (射血分数). This is a measure of heart performance; you measure how much blood is being pumped out by the left ventricle (心室). Healthy people"s ejection fraction is about 55%. These patients had ejection fraction of under 35%. They all had by-pass surgery (搭桥手术) performed on them. Some of the patients had stem cells taken from their hip bones and injected into 25-30 sites in the damaged heart muscle. Six months later their ejection fraction rate was 46.1% while those who just had surgery but no stem cell injections averaged 37.2%. No side effects were reported. Heart failure is a common problem all over the world. In the UK alone about 650,000 people suffer from heart failure every year. As the number of people suffering from heart failure increases in the world in general these findings are particularly significant. Current treatments relieve the symptoms. This new stem cell therapy actually repairs the damaged muscle in the heart and has the potential of curing the disease.

单选题Mary said mildly that she was just curious.

单选题Things have changed a lot since I was a child.A. greatlyB. graduallyC. suddenlyD. frequently

单选题Life was not easy for many children living 100 years ago,

单选题Mary {{U}}called me up{{/U}} very late last night. A. shouted at me B. visited me C. telephoned me D. waked me

单选题The idea of test-tube babies may make you starry-eyed with delight at the wonders of modern medicine or bleary-eyed with considering the moral/legal implications of starting life in a laboratory. But if you've ever been pregnant(怀孕)yourself, one thing is certain: You wonder what it's like to carry a test-tube baby. Are these pregnancies normal? Are the babies normal? The earliest answers come from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne have taken a look at the continent's first nine seemed to proceed according to plan, but at birth some unusual trends did show up. Seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section(剖腹产术). And one baby, a twin, was born with a serious heart defect and a few days later developed life-threatening abdominal problems. What does it all mean? Even the doctors don't know for sure, because the numbers are so small. The proportion of girls to boys is high, but until there are many more test-tube babies no one will know whether that's pure coincidence(巧合)or something special. The same thing is true of the single heart defect; it usually shows up in only 15 out of 60,000 births in that part of Australia, but the fact that it occurred in one out of nine test-tube babies does not necessarily mean that they are at special risk. One thing the doctors can explain is the high number of Caesareans. The Australian researchers report that they are quite encouraged. All the babies are now making nomal progress--even the twin with the birth defects.

单选题Some astronomers {{U}}contend{{/U}} that the universe may be younger than previously believed.

单选题No part of New Hampshire is far from water.

单选题Which of the following is true of the experience-monitoring function?

单选题In a speech to schoolchildren last week that had some conservative opponents up in arms, President Obama delivered at least one line that seemed incontestable (无可不论的): "I hope you'll all wash your hands a lot, and stay home from school when you don't feel well, so we can keep people from getting the flu this fan and winter. "The Disney corporation is now marketing Musical Hand Wash Timers featuring characters like the Little Mermaid, and encouraging parents to "take precaution against swine flu" by teaching children to wash their hands correctly. "Studies prove that regular hand - washing dramatically reduces the spread of infection," says the Disney Web page, which links to the Centers for Disease Control and Prevention's Web site. What is the paragraph mainly about?A. It is publicized that hand - washing is an effective way to reduce the spread of swine flu.B. President Obama encouraged children to wash hands a lot to stay healthy.C. Disney corporation now is interested in public health affairs.D. Washing hands correctly is very important in reducing the spread of swine flu.

单选题Reading the job ad, he wondered whether he was {{U}}eligible{{/U}} to apply for it.

单选题Foreign military aid was prolonging the war.

单选题Techniques to employ the energy of the sun are being developed.

单选题He was {{U}}evidently{{/U}} holding light onto himself about something.