阅读理解 School-age children should participate in 60 minutes or more of moderate to vigorous physical activity daily, according to an expert panel. "The take-home message for parents is that it is very important to ensure that their children spend at least an hour a day in some form of appropriate physical activity," says Dr. William B. Strong, a pediatric cardiologist and retired professor at the Medical College of Georgia who co-chaired the panel.
"The important thing is we have to get American children and adolescents active," says co-chair Dr. Robert M. Malina, research professor and an expert in growth and development at Tarleton State University in Stephenville, Texas. "The evidence is very clear that physical activity has decreased dramatically in the last 10 to 20 years," Dr. Malina says as the technology revolution of the 1980s produced more sedentary options for children while their caloric intake has essentially remained the same.
"Our children are just not burning up those calories today," Dr. Malina says of the obesity epidemic in children. "All of us need to help children increase the amount of time spent in moderate to vigorous physical activity. This means that parents, coaches, teachers and others who influence youngsters need to become active role models and get children involved with regular participation in physical activity."
"Increasing the level of habitual moderate to vigorous intensity physical activity in youth is a health promotion and a disease prevention strategy," the panelists conclude. Restoration of physical education and other school—and community—based programs could contribute mightily to that strategy, they say.
Recommendations of the 13-member panel are published in the June issue of The Journal of Pediatrics. Panelists were convened by the Constella Group, Inc., a professional health services company headquartered in Durham, N.C., contracted by the Divisions of Nutrition and Physical Activity and Adolescent and School Health of the Centers for Disease Control and Prevention.
"We were asked to review the literature and find evidence of the impact of physical activity on the health and well-being of children and to make recommendations based on the evidence, not just on what we all believe to be beneficial," says Dr. Strong, Charbonnier Professor Emeritus at MCG and founding director of MCG's Georgia Prevention Institute, where researchers are exploring issues such as the impact of activity on children's weight and cardiovascular health.
单选题 1.According to Dr. Malina, the decrease in physical activity amongst young Americans is mainly due to______.
【正确答案】 D
【答案解析】属细节题。A项文中没有提到缺乏体育课是体育活动减少的原因。B是导致肥胖的原因。根据第二段第二句，玛丽娜博士说，在过去的10至20年中，有迹象清楚地表明孩子们体育活动的时间明显下降，20世纪80年代的技术革命为孩子们提供了更多久坐不动的机会……，故D为正确答案。C项不是根本原因。
单选题 2.Which of these is NOT a recommendation of the expert panel mentioned in the text?
【正确答案】 A
【答案解析】属细节题。文章第三段中玛丽娜博士指出：我们都应当帮助孩子们适当增加体育活动，这就意味着父母、教练、老师和其他对他们有影响力的人都要充当榜样，鼓励孩子们坚持参加体育活动。第四段还提到恢复体育课和其他学校或社区举办的活动。只有A没有涉及，所以为答案。
单选题 3.According to the text, besides promoting health, increasing the amount of physical activity in youth can also______.
【正确答案】 C
【答案解析】属细节题。根据题干promoting health定位到原文第四段开头，对应disease preventionstrategy的只有选项C。D只是一项具体措施。
单选题 4.The panel was organized in order to______.
【正确答案】 C
【答案解析】属推断题。根据题干定位到文章末段首句：我们的任务是回顾历史文献，找到证据，证明体育活动对孩子们身心健康的影响，并据此提出建议……，故而选C。A和B范围太大，因为关于美国年轻人运动量小的原因和健康的表现有很多。D的后半句——确定帮助年轻人保持健康的办法——超出原文的内容。
单选题 5.We can learn from the text that______.
【正确答案】 A
【答案解析】属推断题。原文第三段指出：我们所有人都需要鼓励孩子们花更多时间进行体育锻炼，这就意味着父母、教练、老师和其他对他们有影响力的人都有责任。所以答案选A。B中的in thecoming years与原文不符。选项C中的eat more than they used to与原文矛盾(第二段末句)。D与原文第一段不符。