B. To introduce a new program.
C. To seek supportive evidence.
D. To prove his program is better.
69. What is Margaret Morrissey’s opinion about the new program?
A. Favourable.
B. Doubtful.
C. Optimistic.
D. Acceptable.
70. Which of the following is true?
A. Teachers may not like the program.
B. Schools are trying to make profits.
C. The program is already under way.
D. The program is popular with children.
D
Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunity(免疫)and resistance in humans, the scientists said.
“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits, such as immunity,” said Robin May of the University of Birmingham, who led the study.
Populations across the world are aging at a surprising pace, bringing potentially big challenges for health and social care systems. A study by Danish scientists last year found that half of babies born in the rich world today will live to celebrate their 100th birthdays. Scientists are eager to find out how people age to try to develop drugs to help them stay healthier as their lives extend.
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