0  424157  424165  424171  424175  424181  424183  424187  424193  424195  424201  424207  424211  424213  424217  424223  424225  424231  424235  424237  424241  424243  424247  424249  424251  424252  424253  424255  424256  424257  424259  424261  424265  424267  424271  424273  424277  424283  424285  424291  424295  424297  424301  424307  424313  424315  424321  424325  424327  424333  424337  424343  424351  447090 

63. Which of the following is NOT mentioned in the article?

A. The men with low-risk prostate in the study lost weight and lowered their blood pressure.

B. A famous author and Dr. Dean Ornish led this research.

C. Dr. Dean Ornish expressed his optimism about this research in a telephone interview.

D. Conventional medical treatment has no effect on the men with prostate cancer.

C

The world's oceans have warmed 50 percent faster over the last 40 years than previously thought due to climate change, Australian and US climate researchers reported on Wednesday. Higher ocean temperatures expand the volume of water, contributing to a rise in sea levels that is submerging small island nations and threatening to great damage in low-lying, densely-populated delta regions around the globe.

The study, published in the British journal Nature, adds to a growing scientific chorus of warnings about the pace and consequences of rising oceans. It also serves as a corrective to a massive report issued last year by the Nobel-winning UN Intergovernmental Panel on Climate Change(IPCC), according to the authors.

Rising sea levels are driven by two things: the thermal(热)expansion of sea water, and additional water from melting sources of ice. Both processes are caused by global warming. The ice sheet that sits at the top of Greenland, for example, contains enough water to raise world ocean levels by seven metres(23 feet), which would bury sea-level cities from Dhaka to Shanghai.

Trying to figure out how much each of these factors contributes to rising sea levels is critically important to understanding climate change, and forecasting future temperature rises, scientists say. But up to now, there has been a confusing gap between the projections of computer-based climate models, and the observations of scientists gathering data from the oceans.

The new study, led by Catia Domingues of the Centre for Australian Weather and Climate Research, is the first to reconcile(与…一致)the models with observed data. Using new techniques to assess ocean temperatures to a depth of 700 metres(2,300 feet)from 1961 to 2003, it shows that thermal warming contributed to a 0.53 millimetre-per-year rise in sea levels rather than the 0.32 mm rise reported by the IPCC.

试题详情

62. In total, how many disease-preventing genes turned on as a result of the healthy lifestyle?

A.   30      B. 453          C.500      D. 48

试题详情

61. Apart from eating healthy food and exercising, the men in the study__________.

A. were put under a lot of stress.

B. were walking for hours a day..

C. were taught stress management methods.

D. were thinking for a whole day.

试题详情

60. The article basically states that a healthy lifestyle__________.

A. can even change your genes for the better.

B. has no effect on your genes.

C. is good for the environment.

D. helps men recover from prostate cancer.

试题详情

59. According to the passage, which of the followings is TRUE?

A. In December, "Portrait of Suzanne Bloch" and "O Lavrador de Cafe" painted by Candido Portinari were stolen.

B. There are steel doors and no detectors in Sao Paulo Museum of Art.

C. Three robbers defeated three armed museum guards and took away the works on Thursday.

D. Three suspects in the first high-profile art theft in less than a year were arrested.

B

Comprehensive lifestyle changes including a better diet and more exercise can lead not only to a better physique, but also to swift and dramatic changes at the genetic level, U.S. researchers said on Monday. In a small study, the researchers tracked 30 men with low-risk prostate cancer(前列腺癌)who decided against conventional medical treatment such as surgery and radiation or hormone therapy.

The men underwent three months of major lifestyle changes, including eating a diet rich in fruits, vegetables, whole grains, legumes and soy products, moderate exercise such as walking for half an hour a day, and an hour of daily stress management methods such as meditation(冥想). As expected, they lost weight, lowered their blood pressure and saw other health improvements. But the researchers found more profound changes when they compared prostate biopsies taken before and after the lifestyle changes. After the three months, the men had changes in activity in about 500 genes -- including 48 that were turned on and 453 genes that were turned off. The activity of disease-preventing genes increased while a number of disease-promoting genes, including those involved in prostate cancer and breast cancer, shut down, according to the study published in the journal Proceedings of the National Academy of Sciences.

The research was led by Dr. Dean Ornish, head of the Preventive Medicine Research Institute in Sausalito, California, and a well-known author advocating lifestyle changes to improve health. "It's an exciting finding because so often people say, 'Oh, it's all in my genes, what can I do?' Well, it turns out you may be able to do a lot," Ornish, who is also connected with the University of California, San Francisco, said in a telephone interview. "'In just three months, I can change hundreds of my genes simply by changing what I eat and how I live'. That's pretty exciting," Ornish said. "The implications of our study are not limited to men with prostate cancer."

试题详情

58. How many people were in the museum during the robbery?

A. A lot. The museum was crowded.

B. Not too many. It was almost empty.

C. There were a lot of people outside the museum.

D. Only three of them.

试题详情

57. Why didn't the thieves take other more valuable works?

A. Because they didn't know that the other pieces were worth more.

B. Probably because they had received an order for the prints that they took.

C. Because they didn't have enough time.

D. Because they were in such a hurry that they couldn’t get them all.

试题详情

56. What did the armed men steal on Thursday?

A. Two prints by Pablo Picasso

B. Two oil painting by Brazilian artists

C. Two prints by Pablo Picasso and two oil paintings by two Brazilian artists.

D. Two prints by two Brazilian artists and two oil paintings by Picasso Pablo.

试题详情

54. A. careful       B. sensitive      C. active          D. thoughtful

试题详情


同步练习册答案