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[Issue Essay]

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题目:

Analytical!

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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:

点赞1
阅读268074
解答: 张慧雯

提问:

请问老师这道题怎么做,谢谢!

解答:

点赞0
阅读938550
解答: 徐小梅老师

提问:

请问徐老师这道题怎么列式呀?我卡在different那里了

解答:

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阅读929311
解答: 徐小梅老师

提问:

请徐老师用您的方法讲解一下这道题,谢谢!

解答:

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阅读923357
解答: 徐小梅老师

提问:

请教一下May老师,圈起来的地方有点转不过弯,请解答,谢谢!

解答:

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阅读867744
解答: 徐小梅老师

提问:

有点不知道怎么算

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阅读296027
解答: 徐小梅老师

提问:

这道题B我选了C,B我算的不能确定s3一定在呀,请老师点拨!

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阅读296621
解答: 徐小梅老师

提问:

这个错选了D,麻烦老师讲解一下关于年利率的知识点吧,有点糊。谢谢老师!

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阅读297089
解答: 徐小梅老师

提问:

老师好,这道题正确答案是A。我通过这里的第一个and并列两个句子只留下了AD,但AD不太会排,麻烦老师讲一下,谢谢!

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阅读297237
解答: 金栩竹老师

提问:

作文,感觉找不出其他错了,请老师看看,感谢!

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阅读297102
解答: 英吉老师

提问:

我列了一下式子感觉第二年的销量和价格都能用第一年的多少倍来表示呀,难道是因为没有说是不是沙发的单价全都相等?

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阅读299920
解答: 徐小梅老师

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