Unit 3 Sea Exploration Period One Reading and Thinking—Comprehension 课件（共53张）+学案（含答案）+练习（含答案）

Unit 3　SEA EXPLORATION Period One　　Reading and Thinking—Comprehension Ⅰ.1.故事,叙述　2.伸出　3.看　4.撤回　5.商人 Ⅱ.1.bond(s)　2.royal　3.has been extended 4.negotiate　5.league　6.withdrawn Ⅲ.1.search for　2.in a league of his own　3.for the benefit of　4.in hand　5.a sight to behold　6.lay/form the foundation for Ⅳ.【文章大意】 本文是一篇说明文。文章介绍了海洋探索的重要性、海底测绘的现状、海洋生物的多样性以及我们对海洋及其生物的了解程度。文章强调了继续探索和研究海洋的必要性。 1.B　细节理解题。根据第二段“Seafloor mapping provides a sense of what may lie beneath and guides decisions about where to explore. While the entire seafloor has been mapped using data collected from satellites, these data provide only a general picture of what’s there. Detail is limited on these maps, so some important geographical features like seamounts and objects like shipwrecks (失事船只) remain unseen.”及第三段中“As of 2023,24.9% of the global seafloor had been mapped with modern high-resolution (高分辨率的) technology, usually fixed on ships, which can reveal the seafloor in greater detail.”可知,海底测绘可以更详细地展示海底的情况。故选B项。 2.A　推理判断题。根据第三段中的“While almost 50% of the seafloor beneath US waters had been mapped to these modern standards, the nation’s seafloor is larger than the land area of all 50 states. Thus, there’s still a significant amount of seafloor left to be mapped at high resolution.”可知,第三段提到美国水域下方的海底是为了强调绘制海底地图的进一步任务。故选A项。 3.C　细节理解题。根据第四段中的“More is known about the seafloor than the species that call the ocean home. Seafloor maps can provide information about potential habitats, but they can’t identify species on the seafloor or provide information about how they interact with each other and their environments.”可知,通过海底地图我们可以了解海洋物种的栖息地。故选C项。 4.D　主旨大意题。通读全文可知,文章介绍了海洋探索的重要性、海底测绘的现状、海洋生物的多样性以及我们对海洋及其生物的了解程度。文章强调了继续探索和研究海洋的必要性。D项(有多少海洋已经被勘探过了 )适合做文章的最佳标题。故选D项。 Ⅴ.【文章大意】 本文是一篇说明文。文章主要介绍了海水的成分、海水变咸的原因,以及一些高盐湖泊的存在和海水淡化的潜在可能。 1.A　根据空前内容“What is in ocean water, anyway ”可知,空前提问海水里到底有什么。选项A“It is mostly made up of water, of course.”(当然,它主要是由水组成的。)回答了上文的提问,指出海水主要是由水组成的。故选A。 2.D　根据空后内容“And the acid eats away at rocks and soil.”可推测,空处需要提到“酸”。选项D“As you might already know, rainwater is mildly acidic.”(你可能已经知道,雨水是微酸性的。)指出雨水是微酸的,使得后文关于雨水中的酸侵蚀岩石和土壤的叙述更加合理。故选D。 3.F　根据空前内容“A similar reaction happens when underwater volcanoes erupt. The sea water surrounding the volcano reacts with the hot rocks of the volcano.”可知,水下火山爆发也会产生盐。选项F“Minerals and salts from those rocks dissolve in the ocean water.”(那些岩石中的矿物质和盐溶解到海水 ... ...