首页
登录
职称英语
Fifty volunteers were alphabetically divided into two equal groups, Group A to p
Fifty volunteers were alphabetically divided into two equal groups, Group A to p
游客
2024-03-02
61
管理
问题
Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a 7 week exercise program, and Group B to avoid deliberate (故意的,蓄意的) exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps a minute for 5 minutes. One minute after completion of the step-test, file pulse rate of each subject was taken and recorded. This served as the pretest for tile experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an Exercycle (a motor-driven bicycle-type exercise machine) for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day’s ride, merely holding on to the handle bars and foot pedals as tile machine moved. Then, (or the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, anti pedaled actively for 10 seconds of each minute. The ratio of active riding was increased every few clays, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding.
At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses taken. The post-exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero. [br] This passage implies that ______.
选项
A、most people do not get enough exercise
B、a high pulse rate is desirable
C、regular exercise can strengthen your heart
D、everyone should exercise 15 minutes a day
答案
C
解析
这篇文章讲的是通过A和B两组人进行对照测试心脏功能情况; A组每天锻炼,B组不进行锻炼; 结果反映A组参加锻炼的人心脏脉搏跳动不断减少,而B组人其心脏跳动情况不变, 由此可见有规律地参加锻炼有益于心脏健康
转载请注明原文地址:http://tihaiku.com/zcyy/3500050.html
相关试题推荐
Thelanguageofuncivilizedgroupsascomparedtowesternlanguageislimitedin
Themainpurposeofthepassageisto______.[br]Whichofthefollowinggroups
【B1】[br]【B15】A、caughtB、sharedC、dividedD、separatedB此题为动词与名词搭配辨析题,也是近义词辨析题。r
【B1】[br]【B3】A、groupsB、speciesC、classesD、regionsB名词辨义题[考频:30]。这句的意思是“世界上大约有
Developmentbanksareinternationallendinggroups.Theylendmoneytodevelo
WhyGooglecan’tclaimvictory?[br]Consumergroupshavetheotherideaabout
Developmentbanksareinternationallendinggroups.Theylendmoneytodevelopin
Developmentbanksareinternationallendinggroups.Theylendmoneytodevelopin
Developmentbanksareinternationallendinggroups.Theylendmoneytodevelopin
Developmentbanksareinternationallendinggroups.Theylendmoneytodevelopin
随机试题
TheJapanesedesireformarriagehadbeenverystrong.Inthefifth"worldy
Betweenthetwoworldwars,seriousnovelistsandplaywrights(剧作家)werereadand
Jenny:Hey,Rosy!IheardthatyouaregoingtoTheMalltoday.Rosy:【D1】______
Intheearly1800’s,over80percentoftheUnitedStateslaborforcewasen
Heisalwaysbusy,soIdon’tcare________________________(他是否有空)thisSunday.wh
(2020年真题)接地装置由埋入地下的接地体和连接用的接地线构成.接地体可分为自
基金托管人对基金管理人的估值原则和程序有异议时,应()A.与基金管理公司的估值
假定组合经理购买了1年期面值$100M的风险债券。为了对债券发行者不会全额支付
( )是介于基层和土基之间的层位。A.垫层 B.基层 C.底基层 D.磨耗
27岁,初孕妇,妊娠29周,睡眠中发生无痛性阴道流血,流血量与贫血程度成正比,诊
最新回复
(
0
)