Ⅰ.阅读理解
A
Patients in the early stages of Alzheimer's disease often struggle to remember recently learned information, meaning they forget things like important appointments or where they left their keys. But it seems that these memories are not lost. They are still filed away in the brain somewhere; they just can't be easily accessed.
Now, researchers at MIT have developed a means of getting back me mories in mice suffering from Alzheimer's. The method relies on a technique that uses light to control genetically modified neurons (转基因神经元). Currently it is too early to be used in human trials as it involves inserting light emitting(发光) equipment into the subjects' brains, but the same principles still apply, the researchers said.
“The important point is that this is evidence of the concept. That is, even if a memory seems to be gone, it is still there. It's a matter of how to get i t back，”said the senior researcher Susumu Tonegawa.
The team took two groups of mice, one genetically engineered to develop Alzheimer's and one healthy. They then placed them into a room and gave them a mild electric shock.All of the mice showed fear when
