OG8 阅读 Q23

Choice D is the best answer. The first five paragraphs introduce salt's ability to stretch "like taffy to more than twice its length." In the fifth paragraph, the passage shifts into an explanation of how "Moore and his colleagues discovered salt's stretchiness." The last paragraph speculates about the possible application of this discovery: "The work also suggests new techniques for making nanowires, which are often created through nano-imprinting techniques." The passage's overall structure can therefore be seen as consisting of an introduction to an interesting salt property, followed by a description of how the property was discovered, followed by a speculation regarding applications of this property.
Choice A is incorrect because the passage discusses only one way in which salt differed from researchers' expectations. Choice B is incorrect because the passage begins not with a hypothesis about salt's behavior but with an explanation of its behaviors. Choice C is incorrect because the passage discusses complementary observations of salt crystals rather than two experiments involving salt that yield seemingly conflicting results.