各位要參加2020年GMAT考試的小伙伴們注意啦！今天幫考網(wǎng)要給各位小伙伴分享2020年GMAT考試《GMAT數(shù)學(xué)》的每日一練，感興趣的小伙伴趕快來(lái)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

題目類型：

evaluate the argument

題目翻譯：

通常，PG通過(guò)分泌M來(lái)控制一個(gè)人的睡-醒循環(huán)，而M是眼睛所探測(cè)到的光暗的反應(yīng)。然而，許多因?yàn)榇竽X視覺(jué)皮質(zhì)受到損傷致盲的人可以很容易地維持24小時(shí)的睡-醒循環(huán)。所以，從眼睛到PG的神經(jīng)傳導(dǎo)可能不通過(guò)大腦的視覺(jué)皮質(zhì)。以下哪一項(xiàng)最有助于評(píng)估這段論述的正確性?

解題思路：

無(wú)既定思路，逐項(xiàng)分析。

逐項(xiàng)分析：

A、M并非越多越好，補(bǔ)充M有可能導(dǎo)致過(guò)量，故無(wú)法得出確切結(jié)論，排除。

B、正確選項(xiàng)。符合題干主旨。

C、M是不是PG分泌的唯一物質(zhì)。無(wú)關(guān)項(xiàng)。

D、沒(méi)有24小時(shí)睡-醒循環(huán)的人是不是有他們特定的周期。無(wú)關(guān)項(xiàng)。

E、對(duì)光暗的異?？赡苡泻芏嘣颍灰欢ㄊ且曈X(jué)皮質(zhì)引起的，排除。

正確選項(xiàng)：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

題目類型：

evaluate the argument

題目翻譯：

V要求公立學(xué)校的學(xué)生教師比不得超過(guò)一個(gè)特定的數(shù)值。所有的V地的學(xué)生都有權(quán)在公立學(xué)校接受免費(fèi)教育。當(dāng)經(jīng)濟(jì)危機(jī)發(fā)生的時(shí)候，平均收入會(huì)下降，此時(shí)到公立學(xué)校上學(xué)的人會(huì)增加。因此，在經(jīng)濟(jì)危機(jī)中，到V地的公立學(xué)校找一份教師的工作不會(huì)很難。以下哪一項(xiàng)最有助于評(píng)估這段論述的正確性?

解題思路：

無(wú)既定思路，逐項(xiàng)分析。

逐項(xiàng)分析：

A、在V地，是不是有非公立的學(xué)校也為學(xué)生提供免費(fèi)教育。無(wú)關(guān)項(xiàng)。

B、正確選項(xiàng)。如果答案是“是”，那么在經(jīng)濟(jì)危機(jī)中到V地的公立學(xué)校找一份教師的工作就會(huì)很難;如果答案是“否”，就不會(huì)很難。

C、V地公立學(xué)?，F(xiàn)在的學(xué)生教師比例是多少。無(wú)關(guān)項(xiàng)。

D、V地的勞動(dòng)力現(xiàn)在有多少在公立學(xué)校當(dāng)老師。無(wú)關(guān)項(xiàng)。

E、過(guò)去V地公立的學(xué)校有沒(méi)有學(xué)生教師比超過(guò)現(xiàn)在新規(guī)定的。無(wú)關(guān)項(xiàng)。即使過(guò)去有，以后也不會(huì)有，因?yàn)橐?guī)定是新的。

正確選項(xiàng)：B

好了，以上就是2020年GMAT考試《GMAT數(shù)學(xué)》每日一練（3）的全部?jī)?nèi)容了，如果各位小伙伴還有不明白的地方，可以進(jìn)入幫考網(wǎng)咨詢了解哦！