各位要参加2020年GMAT考试的小伙伴们注意啦！今天帮考网要给各位小伙伴分享2020年GMAT考试《GMAT数学》的每日一练，感兴趣的小伙伴赶快来看看哦！

1、Normally, the pineal gland governs a person’s sleep-wake cycle by secreting melatonin in response to the daily cycle of light and darkness as detected by the eye. Nonetheless, many people who are totally blind due to lesions in the visual cortex of the brain easily maintain a 24-hour sleep-wake cycle. So the neural pathway by which the pineal gland receives information from the eye probably does not pass through the visual cortex.

For purposes of evaluating the argument it would be most useful to establish which of the following?

(A) Whether melatonin supplements help people who have difficulty maintaining a 24-hour sleep cycle to establish such a pattern

(B) Whether the melatonin levels of most totally blind people who successfully maintain a 24-hour sleep-wake cycle change in response to changes in exposure to light and darkness

(C) Whether melatonin is the only substance secreted by the pineal gland

(D) Whether most people who do not have a 24-hour sleep-wake cycle nevertheless have a cycle of consistent duration

(E) Whether there are any people with normal vision whose melatonin levels respond abnormally to periods of light and darkness

题目类型：

evaluate the argument

题目翻译：

通常，PG通过分泌M来控制一个人的睡-醒循环，而M是眼睛所探测到的光暗的反应。然而，许多因为大脑视觉皮质受到损伤致盲的人可以很容易地维持24小时的睡-醒循环。所以，从眼睛到PG的神经传导可能不通过大脑的视觉皮质。以下哪一项最有助于评估这段论述的正确性?

解题思路：

无既定思路，逐项分析。

逐项分析：

A、M并非越多越好，补充M有可能导致过量，故无法得出确切结论，排除。

B、正确选项。符合题干主旨。

C、M是不是PG分泌的唯一物质。无关项。

D、没有24小时睡-醒循环的人是不是有他们特定的周期。无关项。

E、对光暗的异常可能有很多原因，不一定是视觉皮质引起的，排除。

正确选项：B

2、Vargonia has just introduced a legal requirement that student-teacher ratios in government-funded schools not exceed a certain limit. All Vargonian children are entitled to education, free of charge, in these schools. When a recession occurs and average incomes fall, the number of children enrolled in government-funded schools tends to increase. Therefore, though most employment opportunities contract in economic recessions, getting a teaching job in Vargonia’s government-funded schools will not be made more difficult by a recession.

Which of the following would be most important to determine in order to evaluate the argument?

(A) Whether in Vargonia there are any schools not funded by the government that offer children an education free of charge

(B) Whether the number of qualified applicants for teaching positions in government-funded schools increases significantly during economic recessions

(C) What the current student-teacher ratio in Vargonia’s government-funded schools is

(D) What proportion of Vargonia’s workers currently hold jobs as teachers in government-funded schools

(E) Whether in the past a number of government-funded schools in Vargonia have had student-teacher ratios well in excess of the new limit

题目类型：

evaluate the argument

题目翻译：

V要求公立学校的学生教师比不得超过一个特定的数值。所有的V地的学生都有权在公立学校接受免费教育。当经济危机发生的时候，平均收入会下降，此时到公立学校上学的人会增加。因此，在经济危机中，到V地的公立学校找一份教师的工作不会很难。以下哪一项最有助于评估这段论述的正确性?

解题思路：

无既定思路，逐项分析。

逐项分析：

A、在V地，是不是有非公立的学校也为学生提供免费教育。无关项。

B、正确选项。如果答案是“是”，那么在经济危机中到V地的公立学校找一份教师的工作就会很难;如果答案是“否”，就不会很难。

C、V地公立学校现在的学生教师比例是多少。无关项。

D、V地的劳动力现在有多少在公立学校当老师。无关项。

E、过去V地公立的学校有没有学生教师比超过现在新规定的。无关项。即使过去有，以后也不会有，因为规定是新的。

正确选项：B

好了，以上就是2020年GMAT考试《GMAT数学》每日一练（3）的全部内容了，如果各位小伙伴还有不明白的地方，可以进入帮考网咨询了解哦！