Scientists have long known that humans are built for endurance（耐力）.Now，a new study shows people's hearts are also bettered for endurance - though how much depends on whether we run，farm，or stay put on the sofa.
To get to the heart of the matter，researchers examined the hearts of more than 160 adult men from four groups：long-distance runners，sedentary（久坐的）adults，highly trained football player，and the Tarahumara，native American farmers famous for their running ability.
When researchers compared the thickest of the heart's ventricles（心室），they found there were clear differences.Endurance runners and farmers had larger，longer ventricles with thin walls，which could help pump（輸送）more blood for a long time，the researchers report today in the Proceedings of the National Academy of Sciences.The football player，whose training was short，high-intensity （高強度的）exercise，had shorter，wider ventricles with thicker walls.So did the sedentary humans.
Because high-intensity activity causes blood pressure to increase for a short amount of time，such shorter ventricle，thick walls，and rounder shapes are good for the football players，researchers say，by making sure enough blood is pumped to the brain.But even without those pressures， a couch potato lifestyle seems to result in the same kind of thickening.
But sedentary readers shouldn't feel heartbroken - the researchers said that changes in heart shape are likely reversible（可逆轉(zhuǎn)的）with more endurance activities.
（1）What does the new study find out？（NO MORE THAN 8 WORDS） People's hearts are also bettered for endurance.People's hearts are also bettered for endurance.
（2）How many groups did the researchers examine？（NO MORE THAN 3 WORDS） Four.Four.
（3）Who had larger and longer ventricles with thin walls？（NO MORE THAN 4 WORDS） Endurance runners and farmers.Endurance runners and farmers.
（4）What does the underlined phrase "a couch potato lifestyle" mean？（You can use Chinese） 久坐的生活方式。久坐的生活方式。
（5）Jimmy is a computer engineer who has to work for long hours on computer.Which of the following ventricle and walls may suit him according to the passage？ CC
A.
B.
C.
D.
【考點】人與自我．
【答案】People's hearts are also bettered for endurance.；Four.；Endurance runners and farmers.；久坐的生活方式。；C
【解答】
【點評】
聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書面同意，不得復(fù)制發(fā)布。
發(fā)布：2024/6/27 10:35:59組卷：1引用：1難度：0.5
相似題
-
1．Most smart phones allow you to run location-sharing software that uses the phone's GPS capability to let friends and family know your exact location．There are lots of great uses for this technology．（1）
So make sure you're permitted to use an app or service，and pay attention to how you are using it．Here're some important points you may find helpful．
Choose what's best for you．Some location-sharing services are games that let you give a shout-out when you've turned up at a particular spot．（2）Still others continue to share your location until you change the setting．Be sure you know exactly how your service shares your location．
Know who your friends are．（3）This means people can search to see if you're online and add you as a friend．It's important to remember that sharing your location with people you've never met in real life is risky，so you should carefully manage friend requests and share your location only with people you know and trust．
（4）Some services automatically stop sending your location after a period of time，but others will send it forever-until you stop it．Review your contact list periodically and delete anyone to whom you no longer feel comfortable revealing your location．
Update parents．Location-based services are a great way for teens to let parents know where they are without having to call or text．（5）If you're heading home late at night，you can also use a service like Glympse to share your location as you drive，so they'll know if you have car trouble or get stuck in traffic．A．Check back often．
B．Keep sending your location．
C．However，these services are not for all children．
D．With its help，you can easily share your location with them．
E．Check-ins ease worries so they don't have to follow your every move．
F．Others show where you are all the time or for a period of time you set．
G．Some location services operate like Facebook，where you invite and accept friends．發(fā)布：2025/1/1 18:0:1組卷：7引用：4難度：0.7 -
2．"Me".It's a small word with big meaning，and that meaning is as individual to each of us as the way we look.Through interviews，Dr Hart，a psychologist，was able to discover what "me" means to other people，and how they have learnt to（1 ）
the beauty in themselves.
Jade has become（2）to selfie apps to beautify herself.She spends hours every day （3）（ edit） her selfies，removing her freckles and enlarging her eyes so as to boost her （4）.Dr Hart says obsessive online photo editing indicates a（5）of self-confidence and a desire for attention.
In Anthony's case，things are different.He never cared about his （6）.He even wore identical trousers and shirts，which made his roommates （7）（ confuse ）.Dr Hart says it's true that inner beauty is very important but （8）beauty shouldn't be completely overlooked.
When it comes to Emma，she is （9）（ large ） than other girls，which bothered her.She tried every means possible to lose weight，which only resulted in pain and poor health，and finally she realized that her（10），mental and physical，is the most important thing.Dr Hart agrees with her一being healthy is beautiful.發(fā)布：2025/1/1 18:0:1組卷：8引用：2難度：0.5 -
3．Dear Laura，
Thanks for letting us to stay at your seaside house． Now， you might have heard from your neighbors about which happened on Saturday evening． When I was out a walk， my younger son， Tom， played football before your house． He made so many noise that the neighbors got quite angrily． Even worse， Tom broke one of the window of Mr． Wilson's house． Tom and I apologized to all the neighbors for the unhappy happenings， but promised to have the broken window repair soon． Tom said that we would not do such silly things any more． I am glad that your neighbors had forgiven us． They are really nice people．
Yours，
Betty發(fā)布：2025/1/30 8:0:1組卷：12引用：2難度：0.5