【正文】 ng caloricexpenditure charts troublesome28. Even exercise professionals concede half a point here (Line 3, Para. 2) means They A) agree that the calories in a small piece of pastry can be difficult to work off by exerciseB) partially believe diet plays a supporting role in weight reductionC) are not fully convinced that dieting can help maintain one39。s study loadD) enrich children39。s economic success is a result of its scientific achievementsC) Japanese preschool education emphasizes academic instructionD)Japan39。t change their plan. B) They39。t meet Tony so early in the morning.3. A) She has to study for the exam. B) She is particularly interested in plays. C) She39。s list.D) The professor has brought extra copies of his assignment.8. A) She doesn39。s because the prescription drugs available for the flu need to be taken soon after the illness sets in. As for colds, the sooner aperson starts taking overthecounter remedy, the sooner relief will e. The mon cold and the flu are both caused by viruses. More than 200 viruses can cause cold symptoms, while the flu is caused by three viruses flu A, B and C. There is no cure for eitherillness, but the flu can be prevented by the flu vaccine ( ~~ ), which is, for most people, the bestway to fight the flu, according to the ALA. But if the flu does strike, quick action can help. Although the flu and mon cold have manysimilarities, there are some obvious signs to look for. Cold symptoms such as stuffy nose, runny nose and scratchy throat typically develop gradually, and adults and teens often do not get a fever. On the other hand, fever is one of the characteristic features of the flu for all ages. And in general, flu symptoms including fever and chills, sorethroat and body aches e on suddenly and are more severe than cold symptoms. The ALA notes that it may be particularly difficult to tell when infants and preschool agechildren have the flu. It advises parents to call the doctor if their small children have flulikesymptoms. Both cold and flu symptoms can be eased with overthecounter medications as well. However,children and teens with a cold or flu should not take aspirin for pain relief because of the risk of Reye syndrome(綜合癥) ，a rare but serious condition of the liver and central nervous syndrome . There is, of course, no vaccine for the mon cold. But frequent hand washing and avoiding close contact with people who have colds can reduce the likelihood of Catching one.11. According to the author, knowing the cause of the misery will help A) shorten the duration of the illnessB) the patient buy medicine over the counterC) the patient obtain cheaper prescription drugsD) prevent people from catching colds and the flu12. We learn from the passage that A) one doesn39。s artistic interestsC) tapping children39。s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that airborne leaded gas emissionsfrom the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, anexpert on the impact of heavy metals on the environment at the National Center for ScientificResearch in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic(北極的 ) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leadedgasoline used in the United States were different from the ratios of European, Asian and Canadiangasolines and thus enabled scientists to differentiate ( 分區(qū)) the lead sources. The dominant leadratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from thesame sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990.The forest environment processed and redistributed the lead faster t