2018年3月17日GRE阅读机经专家分享秒杀长阅读难题提速好资料

2018年03月09日16:14 来源：小站教育作者：小站GRE编辑: 参与（1）阅读（4090）

摘要：GRE阅读中的长篇阅读是许多考生失分问题比较严重的题型，不仅文章本身难度高，而且需要耗费大家大量的时间才能做好。如何才能又快又好地完成长篇阅读的答题？本文将为大家带来秒杀长阅读实用的2018年3月17日GRE阅读机经。

3月许多GRE考生将迎来新学期的开学季，而伴随着学业的开始大家的2018年GRE备考和考试也将进入正轨。那么考生如何才能在开学阶段新的学习任务安排繁重的情况下顺利进行GRE备考并在考试中收获理想成绩？下面小编就为大家带来小站GRE点题专家组精心整理的2018年3月17日GRE全新机经。下面是GRE阅读预测机经，赶紧来刷！

2018年3月17日GRE机经其他题型预测：作文/长阅读/逻辑/填空单空多空/等价/数学 请走这里

题目

长篇阅读

In laboratories, healthy adult human brain neurons typically live no more than a few hours, making extensive research impossible. Furthermore, scientists' inability to reproduce healthy neurons has prevented the use of neurons in experimental treatments of severe neurological disorders.

However, two researchers at the Johns Hopkins University School of Medicine have successfully maintained mature, human brain neurons in long-term cultures by using cells obtained during surgery on an 18-month-old victim of unilateral megalencephaly. The rare disorder, in which one side of the brain grows substantially larger than the other, occurs when neurons in the abnormal hemisphere undergo too many cell divisions before they mature. The neuronal imbalance in the brain of the infant caused seizures, prompting surgeons to remove the enlarged hemisphere---a treatment that has proven successful in similar cases. The researchers then took neurons from the excised brain matter and placed them in a blood-rich culture medium. After days, many of the cells had died, but a few continued to grow and divide. Nineteen months later, the team had subcultured colonies of neurons onto new culture plates more than 20 times, with no significant changes in cellular appearance or growth characteristics.

Scientists still don't know what triggers the proliferation of neurons in unilateral megalencephaly. The neurons cultivated at Johns Hopkins---unlike those culled from tumors are not cancerous, and accordingly are much more valuable as research tools. Finally, the experiment presents the possibility that such neurons could be used in experimental treatments that currently use fetal brain cells, sidestepping an uncomfortable ethical issue.

1. It can be inferred from the passage that the removal of a hemisphere of the brain

A. will allow researchers to expand their knowledge of neurological workings

B. is necessary to cure unilateral megalencephaly

C. is a viable medical procedure in some cases

D. is usually performed on infants who suffer from unilateral megalencephaly

E. is a rare procedure that is performed as a last resort

答案：C

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2. The passage supplies information to answer which of the following questions?

A. How old is the average unilateral megalencephaly patient?

B. Can fetal brain cells be used to treat unilateral megalencephaly?

C. Have scientists found a way to allow cells from victims of unilateral megalencephaly to exist outside of the body?

D. How long can neurons culled from tumors be sustained outside the body?

E. Will scientists find further experimental uses for neurons culled from unilateral megalencephaly victims?

答案：C

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3. In the second paragraph, select the sentence in which a term is introduced that requires elucidation in a later sentence.

答案：However, two researchers at the Johns Hopkins University School of Medicine have successfully maintained mature, human brain neurons in long-term cultures by using cells obtained during surgery on an 18-month-old victim of unilateral megalencephaly.

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