题目内容
Little Johnson got two apples from his aunt, ______ of which he gave to his sister.
A. the bigger one B. a bigger one C. bigger one C. The biggest one
A
Thanks to a combination of young businessmen, large numbers of university students and revitalization (新生) efforts by the local and national governments, today’s Nanjing has an 36 of youthful exuberance (繁茂) that would have been 37 only a few decades ago. 38 , the city, a booming city of 6.5 million on the banks of the Yangtze River some 185 miles west of Shanghai, bears 39 resemblance to the former capital of China that suffered the worst cruelty and violence of World War II.
40 Nanjing has shown a remarkable capacity for reinvention during its 2,500-year history. And in recent years, the city has moved 41 its tragic past to become a vital engine of China’s economic growth, thanks 42 to its position in the middle of China’s prosperous eastern seaboard. Growth has also 43 thanks to improved ground transportation: A new bullet train linking Nanjing and Shanghai started service last year, 44 travel time between the cities from several hours to just 75 minutes, and a Beijing-Shanghai high-speed line is 45 to open later this year, with a stop in Nanjing. Within the city, two metro lines were built in the last few years; 15 more are planned to begin service by 2030.
Signs of Nanjing’s 46 wealth and optimism can be seen everywhere. In the heart of the downtown Xinjiekou district, a bronze statue of Sun Yat-sen, 47 the father of modern China, looks 48 over a busy 49 area.
There is perhaps no more 50 symbol of the city’s transformation than the Zifeng Tower, a 1,480-foot skyscraper that opened its doors last May. 51 offices, restaurants and an InterContinental hotel, the tower is the second-tallest building in China and billed as the seventh-tallest in the world.
Underlying all this development is a large Chinese and 52 student population — there are several major universities, plus a branch of Johns Hopkins’s international studies school. In fact, art and music 53 in all sorts of places.
On a larger 54 , local government officials and private investors are pushing the city as a rising center for contemporary art and architecture, hoping to attract 55 from the neon-bathed streets of its neighbor Shanghai.
| 【小题1】 |
|
| 【小题2】 |
|
| 【小题3】 |
|
| 【小题4】 |
|
| 【小题5】 |
|
| 【小题6】 |
|
| 【小题7】 |
|
| 【小题8】 |
|
| 【小题9】 |
|
| 【小题10】 |
|
| 【小题11】 |
|
| 【小题12】 |
|
| 【小题13】 |
|
| 【小题14】 |
|
| 【小题15】 |
|
| 【小题16】 |
|
| 【小题17】 |
|
| 【小题18】 |
|
| 【小题19】 |
|
| 【小题20】 |
|
PEOPLE who have had a painful experience may wish they could wipe the memory from their minds. Researchers at Johns Hopkins University, US, say that this may someday be possible.
A drug remains far off, but researchers have laid a foundation with their discovery that proteins can be removed from the brain’s fear center to cut memories forever.
Previous research had already shown that a special behavior therapy (治疗) could cut painful memories. But relapse (复发) was possible because the memory hadn’t necessarily disappeared.
By looking at that process, Richard Huganir and Roger Clem, two researchers from Johns Hopkins University, discovered a “window of vulnerability (脆弱的窗口)” when proteins are created. The proteins help signals travel within the brain as painful memories are made. Because the proteins are unstable, they can be easily removed with drugs or behavior therapy to cut memories.
Researchers used mice to find the window, but think the process would be the same in humans. They used electric shocks to make the mice fear a certain sound. The sound triggered (触发) the creation of the proteins, called calcium-permeable (钙通透性) AMPARS, which formed for a day or two in the fear centers of the mice’s brains.
The researchers are working on ways to reopen the window by recalling (唤醒) the painful memory and using drugs to remove the protein. They published their report online last month in Science Express.
Their research has drawn interest and concern from experts in mental healthcare.
Kate Farinholt, a mental health expert with the National Alliance on Mental Illness, Maryland, US, said many people suffering from a painful event might benefit from erasing a memory. “Erasing a memory and then everything bad built on that is an amazing idea, and I can see all sorts of potential ,” she said.
But there are a lot of unanswered questions, too.
“Completely deleting a memory is a little scary. How do you remove a memory without removing a part of someone’s life,” Farinholt said. “And is it best to do that, considering that people grow and learn from their experiences?”
【小题1】What have researchers at Johns Hopkins University found recently?
| A.A new drug to erase painful memories from human brains. |
| B.A special behavior therapy to erase painful memories. |
| C.Removing certain proteins from the brain can wipe painful memories. |
| D.Erasing memory damages a patient’s brain functions. |
| A.The way the brain cells are created. |
| B.The unstable character of the proteins in the brain. |
| C.The strength of the signals the proteins send. |
| D.The drugs that can stop the formation of memories. |
a. removal of fear proteins b. making mice fear a certain sound
c. fear proteins created in mice brains d. making mice recall painful memories
| A.a-b-c-d | B.d-a-c-b | C.b-c-d-a | D.c-b-d-a |
| A.People may lose the chance to learn from their bad experiences. |
| B.The research will be a great breakthrough in treating painful memories. |
| C.People could suffer long-term memory loss. |
| D.People could forget happy memories as well. |