单选题In order to cater for his expenses, he has to do extra work at night.

单选题The child's Uabnormal/U behavior puzzled the doctor.

单选题My oldest brother's daughter would not tell her father he is fat because she loves him so much that she cannot bear to upset him.

单选题France has{{U}} kept intimate links {{/U}}with its former African territories

单选题Happy Marriage, Happy Heart Happily married people have lower blood pressure (51) unhappily married people or singles, a Brigham Young University study says. On the other hand, even having a supportive social network did not translate into a blood pressure benefit for singles or unhappily (52) people, according to the study. "There seem to be some unique health benefits from marriage. It's not just being married (53) benefits health-what's really the most protective of health is having a happy (54) ," study author Julianne Holt-Lunstad, a psychologist who specializes in relationships and health, said in a prepared statement. The study included 204 married and 99 (55) adults who wore portable blood-pressure monitors for 24 hours. The (56) recorded blood pressure at random intervals and provided a total of about 72 readings. "We wanted to capture participants' blood pressure doing whatever they normally (57) in everyday life. Getting one or two readings in a clinic is not really (58) of the fluctuations that occur throughout the day," Holt-Lunstad said. Overall, happily married people scored four points (59) on the blood pressure readings than single adults. The study also found that blood (60) among married people especially those in happy marriages (61) more during sleep than in single people. "Research has shown that people whose blood pressure remains high throughout the night are at (62) greater risk of heart disease than people whose blood pressure drops," HoltLunstad said. The study was published in the March 20 (63) of the journal Annals of Behavioral Medicine. The study also found that unhappily married adults have higher blood pressure than (64) happily married and single adults. Holt-Lunstad noted that married couples can encourage healthy habits in one (65) ,such as eating a healthy diet and having regular doctor visits. People in happy marriages also have a source of emotional support, she said.

单选题We were (astonished) to hear that their football team had won the champion.

单选题The number of United States citizens who are {{U}}eligible{{/U}} to vote continues to increase.

单选题Guests were scared when the bomb exploded.

单选题Will you please call my husband as soon as possible? A. contact B. consult C. phone D. visit

单选题Many science reports discuss medical studies that test the effect of a new drug. Usually, a large number of people is divided into two groups. Each group takes a different substance. But no one knows which group is getting which substance. One group takes the medicine being tested. Another group takes what we call an inactive substance. Medical researchers call this substance a "placebo." The word "placebo" is Latin for "I shall please." Placebo pills(宽心丸)usually are made of sugar. Using placebos to test drugs sometimes has a surprising result. Researchers say people taking the placebo often report improvements in their health. This is known as "the placebo effect"--pain that is eased or stopped by an inactive substance. In such testing, the drug must perform better than the placebo to prove that it is effective. Doctors have reported that the placebo effect can be used in treatment. For example, a doctor tells a patient that a new drug will stop the pain in his leg. The pill is only sugar. But the patient does not know that. He takes the pill and says his pain is gone. Scientists are beginning to discover some physical reasons for this reaction in some people. They are learning that much of what people believe to be true comes from what the brain expects is going to happen. If the brain believes a drug will ease pain, the brain may begin physical changes in the body that can cause the expected effect. A recent examination of studies on drugs for depression found that placebos eased the depression about as well as the active drugs. Other studies have explored the power of placebos. A study in Japan involved thirteen people who reacted to the poison ivy (常青藤)plant. Poison-ivy causes red itchy sores(伤痕)on some people who touch it. Each person was rubbed on one arm with a harmless leaf, but was told it was poison ivy. Each person was then touched on the other arm with poison ivy, but was told it was a harmless leaf. All thirteen people developed a reaction on the arm where the harmless leaf touched their skin. Only two reacted to the poison ivy leaves. Doctors and scientists worry that the use of placebos may not always be harmless. They say people can become victims of false doctors and others who use placebos to claim they can cure disease.

单选题He spent several months in ______ the wild horse.A. to tameB. tameC. tamingD. tamed

单选题This text is too difficult to comprehend.

单选题Mark proved to be a very competent manager.A. efficientB. successfulC. competitiveD. capable

单选题{{B}}第三篇{{/B}} {{B}}First Aid{{/B}} First aid is emergency care for a victim of sudden illness or injury until more skillful medical treatment is available. It may save a life or improve certain vital signs including pulse, temperature, a clear airway (气道), and breathing. In minor emergencies, first aid may prevent a victim's condition from turning worse and provide relief from pain. First aid must be administered as quickly as possible. In the case of the critically injured, a few minutes can make the difference between complete recovery and loss of life. First-aid measures depend upon a victim's needs and the provider's level of knowledge and skill. Knowing what not to do in an emergency is as important as knowing what to do. Improperly moving a person with a neck injury, for example, can lead to permanent spinal (脊柱的) injury and paralysis (瘫痪). Despite the variety of injuries possible, several principles of first aid apply to all emergencies. The first step is to call for professional medical help. The victim, if conscious, should be reassured that medical aid has been requested, and asked for permission to provide any first aid. Next, assess the scene, asking other people or the injured person's family or friends about details of the injury or illness, any care that may have already been given, and preexisting conditions such as diabetes (糖尿病) or heart trouble. The victim should be checked for a medical bracelet (手镯) or card that describes special medical conditions. Unless the accident scene becomes unsafe or the victim may suffer further injury, do not move the victim. First aid requires rapid assessment of victims to determine whether life-threatening conditions exist. One method for evaluating a victim's condition is known by the acronym (道字母写语) ABC, which stands for: A - Airway: is it open and clear? B - Breathing: is the person breathing? Look, listen, and feel for breathing. C - Circulation: is there a pulse? Is the person bleeding externally? Check skin color and temperature for additional indications of circulation problems.

单选题Have you talked to her lately ?

单选题He {{U}}was obsessed with{{/U}} American horror movies.

单选题Single-parent Kids Do Best Single mums are better at raising their kids than two parents — at least in the bird world. Mother zebra finches have to work harder and raise fewer chicks on their own, but they also produce more attractive sons who are more likely to get a mate. The finding shows that family conflict is as important an evolutionary driving force as ecological factors such as hunting and food supply. With two parents around, there's always a conflict of interests, which can have a detrimental effect on the quality of the offspring. In evolutionary terms, the best strategy for any parent in the animal world is to find someone else to care for their offspring, so they can concentrate on breeding again. So it's normal for parents to try to pass the buck to each other. But Ian Hartley from the University of Lancaster and his team wondered how families solve this conflict, and how the conflict itself affects the offspring. To find out, they measured how much effort zebra finch parents put into raising their babies. They compared single females with pairs, by monitoring the amount of food each parent collected, and removing or adding chicks so that each pair of birds was raising four chicks, and each single mum had two — supposedly the same amount of work. But single mums, they found, put in about 25 per cent more effort than females rearing with their mate. To avoid being exploited, mothers with a partner hold back from working too hard if the father is being lazy, and it's the chicks that pay the price. "The offspring suffer some of the cost of this conflict. " says Hartley. The cost does not show in any obvious decrease in size or weight, but in how attractive they are to the opposite sex. When the chicks were mature, the researchers tested the "fitness" of the male offspring by offering females their choice of partner. Those males reared by single mums were chosen more often than those from two-parent families. Sexual conflict has long been thought to affect the quality of care given to offspring, says zoologist Rebecca Kilner at Cambridge University, who works on conflict of parents in birds. "But the experimental evidence is not great. The breakthrough here is showing it empirically. " More surprising, says Kilner, is Hartley's statement that conflict may be a strong influence on the evolution of behaviour, clutch size and even appearance. "People have not really made that link. " says Hartley. A female's reproductive strategy is usually thought to be affected by hunting and food supply. Kilner says conflict of parents should now be taken into account as well.

单选题You look smart in the new suit.

单选题According to paragraphs 1 and 2, which of the following statements about Donald is NOT true?

单选题According to Dr. Pagel, the academic performance of a student will be affected