本文例举了一些GRE Argument题型的题目的提纲，希望通过这些范例，帮助大家在平时自己复习过程中也学着列作文提纲。
难易程度：★★★
题目题材：自然
gre argument47题目：
Scientists studying historical weather patterns have discovered that in the mid-sixth century, Earth suddenly became significantly cooler. Although few historical records(1) survive from that time, some accounts found both in Asia and Europe mention a dimming of the sun and extremely cold temperatures. Either a huge volcanic eruption or a large meteorite colliding with Earth could have created a large dust cloud throughout Earth's atmosphere that would have been capable of blocking enough sunlight to lower global temperatures significantly(2). A large meteorite collision, however, would probably create a sudden bright flash of light, and no extant historical records of the time(3) mention such a flash. Some surviving Asian historical records of the time, however, mention a loud boom(4) that would be consistent with a volcanic eruption. Therefore, the cooling was probably caused by a volcanic eruption(5).
提纲：
(1)The reliability of historical records is open to doubt.
(2)Other factors can also contribute to the cold temperatures.
(3)The fact that no records about sudden bright flash have been discovered does not indicate that there was no any meteorite collision at that time.
(4)The loud boom mentioned by Asian historical records could be created by reasons other than volcanic eruption.
(5)Granted that the loud boom mentioned by Asian historical records did result from volcanic eruption, the assumption that the eruption would created enough amount of dust, and further lower global temperatures significantly is still open to doubt.
注：题目中括号里的数字表明这句话体现的是提纲中第几号缺陷。
无论是GRE Issue还是GRE Argument，考生都应该养成写提纲的习惯。这种提纲式的GRE写作练习可以帮助考生锻炼写作的逻辑性。
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