Question

If you think that running marathons will help you live a long and healthy life，new research may come as a shock．According to a recent scientific study，people who do a very strenuous workout are as likely to die as people who do no exercise at all．

Scientists in Denmark have been studying over 1，000 joggers（慢跑者） and non-joggers for 12 years．The death rates（率） from the sample group suggest that people who jog at a moderate(适合的) pace two or three times a week for less than two and a half hours in total are least likely to die．

The best speed to jog at was found to be about 5 miles per hour．The research suggests that people who jog more than three times a week or at higher speeds of over 7 mph die at the same rate as non-joggers．The scientists think that this is because strenuous exercise causes structural changes to the heart and arteries(动脉)．Over time，this can cause serious injuries．

Peter Schnohr，a researcher in Copenhagen，said，“If your goal is to decrease（减少） risk of death and improve life expectancy，jogging a few times a week at a moderate pace is a good strategy（策略）．Anything more is not just unnecessary，and it may be harmful．”

The implications（含义） of this are that moderate forms of exercise such as tai chi，yoga and brisk walking may be better for us than “iron man” events，triathlons（三项全能） and long-distance running and cycling．According to Jacob Louis Marott，another researcher in the study，“You don’t actually have to do that much to have a good impact（影响） on your health．And perhaps you shouldn’t actually do too much”．

1.The underlined word “strenuous” in Paragraph l is closest in meaning to“___________”．

A．hard             B．regular

C．practical        D．flexible（灵活的）

2.The author presents some figures in Paragraph 2 to ___________．

A．suggest giving up jogging

B．show risks of doing sports

C．provide supportive evidence（证据）

D．introduce the research process（过程）

3.According to the scientists，why is too much exercise harmful？

A．It may injure the heart and arteries．

B．It can make the body tired out．

C．It will bring much pressure．

D．It consumes too much energy．

4.What can be inferred from the text？

A．No exercise at all is the best choice．

B．More exercise means a healthier life．

C．Marathons runners are least likely to die．

D．Proper exercise contributes to good health．

Answer

1.A

2.C

3.A

4.D

【解析】

试题分析: 本文为说明文，介绍了剧烈运动不利于健康长寿这一研究成果；

1.A 考查猜测词意。这里是在陈述研究成果，由上下文的内容可知指马拉松，铁人三项这样的剧烈运用不利于长寿，故选A项。

2.C 考查推理判断题。根据第二段介绍的是丹麦科学家所做研究的过程，其中引用了一些数字，目的是为研究结果提供证据，故选C项。

3.A 考查细节理解题。根据第三段提到the scientists think that this is because strenuous exercise causes structural changes to the heart and arteries(动脉)．Over time，this can cause serious injuries．科学家认为这是因为剧烈运动给心脏及动脉造成结构性变化，长时间会造成严重损伤，故选A项。

4.D 考查推理判断题。根据最后一段You don’t actually have to do that much to have a good impact（影响） on your health．And perhaps you shouldn’t actually do too much你不应该做过多的运动来影响你的健康，可能是你应该少做，故选D项。

考点 ：科普类阅读。