【文章內(nèi)容簡(jiǎn)介】
ere are many puzzles to be solved, and this is just one of them.”1.According to the passage, what items do scientists often use to learn more about the past? A.Clothing and jewellry. B.Books and stones. C.Knives and chairs. D.People and animals.2.What is important about the stone block mentioned in the passage? A.It proves that people lived in this part of the world more than 3,000 years ago. B.It allows scientists to translate the ancient language used in this area. C.It is evidence of the oldest form of writing ever found in the Americas. D.It shows the people of the area have a written language.3.Why are scientists interested in ancient languages? A.It can allow them to better understand ancient societies. B.So they can speak directly with ancient people. C.It will help learn about the origins of modem languages. D.They can learn stories told during that time.4.Which is probably the best title for the passage? A.World’s First Book B.Oldest Writing in the New World C.What Does It Say? D.New Language Discovered5.The underlined expression “decipher the puzzle” (paragraph 6) most probably means _______. A.discover when the Olmec people lived B.learn why the Olmec civilization disappeared C.learn how to speak Olmec D.find the meaning of the Olmec languageB Why do men die earlier than women? The latest research shows that the reason could be than men’s hearts go into rapid decline (衰弱)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 2025 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 ages of 20 and 70, onethird 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 70yearold 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 toll (造成損失)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 nee