求就why do younge people protest more than old people?这个题目做一个论

When older honeybees take on tasks usually handled by younger bees, aging of their brains is effectively changed, a new study finds. The discovery suggests that in humans, social involvement ought to be considered
in addition to drugs as a way to treat age-related dementia(痴呆).
“We knew from previous research that when bees stay in the nest and take care of larvae—the bee babies---they remain mentally able as long as we observe them,” explained Gro Amdam, who led the research at Arizona State University. “However, after a period of nursing, bees fly out gathering food and begin aging very quickly.”
“After just two weeks, foraging(觅食的)bees have worn wings, hairless bodies, and more importantly, lose the brain function—-basically measured as the ability to learn new things,” Amdam said in a statement.
Amdam and his colleagues wanted to find out what would happen if they “asked” the foraging bees to take care of larval babies again. To find out, they removed younger nurse bees from a nest, leaving the older foraging bees to face a choice: forage or care for the larvae. Some of the older returned to searching for food, and others switched to caring for the nest and larvae. After ten days, about fifty percent of the older bees that had chosen to care for the nest and larvae had “greatly improved their ability to learn new things.”
The researchers also discovered changes in the proteins in the brains of the bees whose learning ability had improved. One of the proteins that changed, called Prx6, is also found in humans and is known to help protect against dementia.
“Maybe social involvement is something we can do today to help our brains stay younger,” Amdam says. “Since the proteins being researched in people are the same proteins bees have, these proteins may be able to respond to specific social experiences.”
Other studies have shown several non-drug methods can help improve brainpower in older people, including going for walks and taking music lessons.
The findings, announced this week, are detailed in the journal Experimental Gerontology.
小题1:What does the underlined word “they” in Paragraph 4 refer to? （No more than 5 words）
小题2:When do the brains of older bees age very fast? （No more than 9 words）
小题3:What is Amdam’s suggestion for old people to prevent dementia? （No more than 6 words）
小题4:What is the best title for the text? （No more than 6 words）

The 16-year-old girl Jessica Watson is said to be the youngest person to sail non-stop alone around the world. But her record has been questioned because someone thought that she has not sailed far enough. She will also not be recognized by the World Speed Sailing Record Council, as it was too dangerous for someone under 18 years old.
Ms Watson sailed into Sydney port on Saturday, seven months after leaving on a hard voyage. Family, friends and Australian Prime Minister Kevin Rudd have gathered to greet her. Thousands of well-wishers waited at the port and watched from boats as Ms Watson sailed her pink, 10m boat over the finishing line. Many more Australians watched the event broadcast live on television. Watson said she was just an “ordinary girl who believed in her dream”.
Ms Watson left Sydney on 18 October, despite that some people disagreed her plan. Watson traveled northeast through the South Pacific and across the equator (赤道), south to Cape Horn at the tip of South America, across the Atlantic Ocean to South Africa, through the Indian Ocean and around southern Australia. The route took her through some of the world’s most changeful waters, and she battled through huge storms and suffered seven accidents of her boat.
People around the world have followed Ms Watson’s adventures on her blog, which she has daily updated (更新). On her blog, she wrote down beautiful sunrise over seas, the excitement of meeting a blue whale and the bright, terrible sight of a shooting star flying across the night sky above her boat. Ms Watson has reportedly sold her story to a news company for $700,000. She is planning to write a book on her experience.
小题1: Which of the following oceans didn’t Ms Watson cross through in her voyage?

A．The Pacific Ocean	B．The Atlantic Ocean
C．The Indian Ocean	D．The Arctic Ocean.

小题2:Ms Watson’s voyage will NOT be considered an official world record mainly because ____.

A．no one can prove that her route was dangerous enough

B．she hasn’t applied for the record

C．girls are not allowed to take part in the dangerous sports

D．teenagers re not encouraged to take such a dangerous adventure

小题3: We can make a conclusion from this passage that Watson ____.

A．would make another voyage for money

B．made the world round voyage for money

C．had no way to communicate with others during the voyage.

D．is so confident and brave that she could overcome troubles on her own

小题4:All the following can be inferred from this passage EXCEPT that ____.

A．her book about her voyage is a best seller

B．people in Australia had much interest in her voyage

C．she spent more than 200 days alone at sea

D．people have different attitudes towards her voyage