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[Issue Essay]

试题详情

题目:

Analytical!

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答案:

提问:

Years before the advent of plate tectonics―the widely accepted theory, developed in the mid-1960's, the holds that the major features of Earth's surface are created by the horizontal motions of Earth's outer shell, or lithosphere―a similar theory was rejected by the geological community. In 1912, Alfred Wegener proposed, in a widely debated theory that came to be called continental drift, that Earth's continents were mobile. To most geologists today, Wegener's The origin of Continents and Oceans appears an impressive and prescient document, containing several of the essential presumptions underlying plate tectonics theory: the horizontal mobility of pieces of Earth's crust; the essential difference between oceanic and continental crust; and a causal connection between horizontal displacements and the formation of mountain chains. Yet despite the considerable overlap between Wegener's concepts and the later widely embraced plate tectonics theory, and despite the fact that continental drift theory presented a possible solution to the problem of the origin of mountains at a time when existing explanations were seriously in doubt, in its day Wegener's theory was rejected by the vast majority of geologists. Most geologists and many historians today believe that Wegener's theory was rejected because of its lack of an adequate mechanical basis. Stephen Jay Gould, for example, argues that continental drift theory was rejected because it did not explain how continents could move through an apparently solid oceanic floor. However, as Anthony Hallam has pointed out, many scientific phenomena, such as the ice ages, have been accepted before they could be fully explained. The most likely cause for the rejection of continental drift―a cause that has been largely ignored because we consider Wegener's theory to have been validated by the theory of plate tectonics―is the nature of the evidence that was put forward to support it. Most of Wegener's evidence consisted of homologies―similarities of patterns and forms based on direct observations of rocks in the field, supported by the use of hammers, hand lenses, and field notebooks. In contrast, the data supporting plate tectonics were impressively geophysical―instrumental determinations of the physical properties of Earth garnered through the use of seismographs, magnetometers, and computers. 我选了E considerable overlap前面是despite XXX说明这个是个成就,他和后面的反对W的观点的事情是相反的。所以感觉D说用这个词的目的是解释为啥W理论。请老师辨析DE!谢谢!

解答:

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解答: 张慧雯

提问:

求问解题过程

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阅读393155
解答: 徐小梅老师

提问:

老师求问这类题解题思路

解答:

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阅读377673
解答: 徐小梅老师

提问:

老师,请问下右图下边三角形底边4是如何求出来的?

解答:

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阅读376103
解答: 徐小梅老师

提问:

请晓梅老师讲下这道题的做法,我虽然做出来了但花了很长时间

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阅读299419
解答: 徐小梅老师

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求问解题过程

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阅读299453
解答: 徐小梅老师

提问:

请徐小梅老师答疑:对B来说是inversely proportional不一定是m/B的形式吧,也有可能是-mB(m>0)的形式,为什么一定要写成两个变量相乘的形式而不是两个变量相加的形式?

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阅读299386
解答: 徐小梅老师

提问:

这个题当时在C和E犹豫了蛮久,而且我看OG答案里也说C might somewhat help to explain。所以这种选项要去判断呢?怎么能准确的定位到正确答案呢? 希望张老师回答一下

解答:

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阅读314249
解答: 张慧雯老师

提问:

想问一下老师做这种题的思路 如何在第一时间内能排出D这种和原文意思很相近的选项而锁定正确答案呢? 希望张老师回答一下

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阅读394608
解答: 张慧雯老师

提问:

请问老师这道题是选c吗?可以解释一下这道题做题思路吗?

解答:

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阅读458947
解答: 英吉老师

提问:

老师这道题是选c吗?可以解释下做题思路吗

解答:

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阅读460557
解答: 英吉老师

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