小题1:She went to Simon’s house without ___爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题完形填空

小题1:She went to Simon’s house without ______________(敲) on the door.

小题2: She is ______________ (期待) a call from her son soon.

小题3: The box was too heavy to move, so he ______________ (推，挤) harder.

小题4:This iphone 5 is one of the ______________ (参观者). He’s looking for it everywhere.

小题5:The children in this school are ______________(大部分) from poor areas.

答案

小题1:knocking

小题2:expecting

小题3:pushed

小题4:visitors’

小题5:mostly

题目分析：

小题1:句意：她不敲门就去了Simon的房子。without是介词，意为“没有”，其后跟动词的-ing形式。故填knocking。

小题2:句意：她期待她儿子的电话。be动词后跟动词的-ing形式，故填expecting。

小题3:句意：这个箱子太重了，移不动，所以他推得更用力。从was判断出，应用一般过去时，故填pushed。

小题4:句意：iphone 5是参观者之一的。他正在到处找。one of后跟名词的复数形式visitors, 又是所属关系，故填visitors’。

小题5:句意：这个学校的孩子大部分来自贫穷的区域。故用副词mostly。

问答题

(46) It is known that the brain shrinks as the body ages, but the effects on mental ability are different from person to person. Interestingly, in a study of elderly men and women, those who had more education actually had more brain shrinkage.
"That may seem like bad news," said study author Dr. Edward Coffey, a professor of psychiatry and of neurology at Henry Ford Health System in Detroit. (47) However, he explained, the finding suggests that education allows people to withstand more brain tissue loss before their mental functioning begins to break down.
The study, published in the July issue of Neurology, is the first to provide biological evidence to support a concept called the "reserve" hypothesis, according to the researchers. In recent years, investigators have developed the idea that people who are more educated have greater cognitive reserves to draw upon as the brain ages; in essence, they have more brain tissue to spare.
(48) Examining brain scans of 320 healthy men and women aged 66 to 90, researchers found that for each year of education the subjects had, there was greater shrink age of the outer layer of the brain known as the cortex. Yet on tests of cognition and memory, all participants scored in the range indicating normal.
"Everyone has some degree of brain shrinkage," Coffey said. "People lose (on average) 2.5 percent per decade starting in adulthood."
There is, however, a "remarkable range "of shrinkage among people who show no signs of mental decline, Coffey noted. Overall health, he said, accounts for some differences in brain size. Alcohol or drug use, as well as medical conditions such as diabetes and high blood pressure, contribute to brain tissue loss throughout adulthood.
In the absence of such medical conditions, Coffey said, education level helps explain the range of brain shrinkage exhibited among the mentally-fit elderly. The more-educated can withstand greater loss.
(49) Coffey and colleagues gauged shrinkage of the cortex by measuring the cerebrospinal fluid surrounding the brain. The greater the amount of fluid, the greater the cortical shrinkage.
Controlling for the health factors that contribute to brain injury, the researchers found that education was related to the severity of brain shrinkage. For each year of education from first grade on, subjects had an average of 1.77 milliliters 11 more cerebrospinal fluid around the brain.
Just how education might affect brain cells is unknown. (50) In their report, the researchers speculated that in people with more education, certain brain structures deeper than the cortex may stay intact to compensate for cortical shrinkage.

名词解释

弯曲