Why do men die earlier than women? The latest research makes it known that the reason could be that men's hearts go into rapid decline when they reach middle age.
The largest study of the effects of ageing on the heart has found that women's longevity may be linked to the fact that their hearts do not lose their pumping power with age.
"We have found that the power of the male heart falls by 20--25 percent between 18 and 70 years of age,”said the head of the study, David Goldspink of Liverpool John Moores University in the UK.
"Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70，one-third of those cells die and are not replaced in men,”said Goldspink. "This is part of the ageing process."
What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman's heart could perform almost as well as a 20-year-old one's.
"This gender difference might just explain why women live longer than men,”said Goldspink.
They studied more than 250 healthy men and women between the ages of 18 and 80，focusing on healthy persons to remove the confusing influence of disease.
The team has yet to find why ageing takes a greater loss on the male heart, said Goldspink.
The good news is that men can improve the health of their heart with regular exercise. Goldspink stressed that women also need regular exercise to prevent their leg muscles becoming smaller and weaker as they age.
1.
The underlined word“longevity" in the second paragraph probably refers to ______.
A. health B. long life C. ageing D. effect
2.
The text mainly talks about ______.
A. men's heart cells B. women's ageing process、
C. the gender difference D. hearts and long life
3.
According to the text, the UK scientists have known that
A. women have more cells than men when they are born
B. women can replace the cells that enable the heart to beat
C. the female heart loses few of the cells with age
D. women never lose their pumping power with age
4.
If you want to live longer, you should
A. enable your heart to beat much faster
B. find out the reason for ageing
C. exercise regularly to keep your heart healthy
D. prevent your cells from being lost
5.
We can know from the passage that
A. the reason why ageing takes a greater loss on the male heart has been found out
B. scientists are on the way to finding out why the male heart loses more of the cells
C. the team has done something to prevent the male from suffering the greater loss
D. women over 70 could lose more heart cells than those at the age of 20
Ella Fant was a middle-aged lady who lived with her only son John in a small house.She__16__John very much. In her__17__he couldn't do anything__18__.Every morning she would give him breakfirst_-19__bed and bring him the papers to__20__.It isn't really true that he was too__21__to work---in fact he had tried a few__22__.First of all he was a window-cleaner and in his first week he managed to__23__at least six windows. Then he__24__a bus conductor and on his second__25__a passenger stole his bag with all the fares（车费）collected.He__26__lost his job as a postman__27__he sent off all the letters when he should have taken them to people's houses. It seemed that there was__28__suitable work for him. So he__29__to join the army. Mrs. Fant was so__30__about this that she told the__31__to all her neighbours. "My John is good to be a soldier," she said. "He is going to be the best soldier there__32__was,I can tell you!"
Then the great day came__33__he was to march past the palace in the parade（接受检阅的队伍）.His__34__mother traveled to the city early in the morning to be sure of getting a good__35__in the crowd. The parade was full of sound and colour. But when John and his fellow soldiers came in sight some of the people watching couldn’t help laughing at the one who couldn't keep pace with the other as they marched along.
But Ella Fant, who was filled with happiness shouted at the top of her voice: "Look at them! They're all out of step except my John! Isn't he the best!"
1.
A.depended on B. waited on C. trusted D. loved
2.
A.hope B. eyes C .head D. beliefs
3.
A.wrong B. great C. good D. strange
4.
A.to B. at C. in D. by
5.
A.check B. read C. keep D. sign
6.
A.lazy B. young C. weak D. shy
7.
A.ones B. years C. tasks D. jobs
8.
A. rub B. drop C. break D. clean
9.
A. followed B met C. became D. found
10.
A. day B. try C. route D. chance
11.
A. thus B. even C. once D. only
12.
A.even if B. so that C. because D. though
13.
A.some B. such C. less D. no
14.
A.began B. promised C. managed D. decided
15.
A.excited B. worried C. anxious D. curious
16.
A.incident B. change C. news D. matter
17.
A.yet B. ever C. never D. just
18.
A.where B. since C. when D. till
19.
A.proud B. kind C. strict D. lucky
20.
A.time B. position C. experience D. impression
---Don’t forget to bring my new books tomorrow afternoon.
-- No, I ________.
A. don’t B. can’t C. won’t D. couldn’t
We always keep ____ gas in case we run out.
A. a great number of B. plenty of C .much too D. a good many
With no one to ____in such a frightening place ,she felt helpless.
A. turn to B. turn in C. turn off D. turn over
They have no idea at all ________.
A. where has he gone B. where did he go
C. which place he has gone D. where he has gone
