Unit 5 作业(十四) Section Ⅱ Using language-【精讲精练】2024-2025学年高中英语选择性必修第四册知能达标训练（外研版2019）

·英语·选择性必修 第四册(配WY版) Section II 作业(十四) Using language 层级基础知识自测 III.用语篇练语法 I don't know 1. you have noticed I.单句语法填空 2. some students don't want to walk to 1. We set out (paint) the whole house but school. 3. can be seen every day is that finished only the front part yesterday. their parents drive them to school. But nowadays. 2. The hotel clerk reminded me that if I wanted to what we should realize is 4. the air is leave today, I had to check by noon. seriously polluted. Do you know 5. we 3. Actually, everyone may go through a time when can do about it? I think it is important 6. things seem to be going wrong, so here is no we should take action right now, Here I have a need (worry) so much. suggestion 7. we should ride our bikes to school!8. 4. Recently researchers have come to the conclusion we can do it will not only have singing in groups could have a positive significant benefits for our health, but also help improve our environment. 9. impact on reducing anxiety and depression. we will have a better environment depends on 10. 5. matters to a museum is not how many we close it is to visitors it has, but can do for ourselves and for nature. people's daily lives. 层级②素养能力提升 6. The question occurred to me we I.阅读理解 should go to get the car repaired. We were in the A middle of the forest at that time. Would you sail over 12, 9oo kilometres across 7. Richard swims three times a week after work. the Pacific Ocean in a boat made from plastic This is he keeps fit. bottles? 8. How much one enjoys himself when travelling In 2olo, a crew of six people did. They sailed depends largely on he goes with, on the Plastiki, an 18. 3-metre boat made from whether his friends or relatives. recycled materials. Everything about the Plastik 9. This is many people fall short: You was environmentally friendly. The sails were should be washing your hands for at least 20 produced from recycled plastic and the masts that seconds. held them from used aluminum pipes. Organic 10. It is uncertain side effects the new materials, such as glue made from nuts and sugar medicine will bring about. were used to keep the bottles in place. To power II.语法与写作 the boat, solar panels and wind turbines were 1.如果你能在如何解决那些问题方面给我们一些 used. 建议,我将不胜感激。 During the journey, crew members lived in a plastic cabin. Their daily routine consisted of sleeping, eating and doing chores. For food, they on how to solve those problems. mainly survived on fresh vegetables grown in a 2.明天会不会举行运动会取决于天气如何。 depends on hanging garden as well as canned and dried food. They also ate fresh fish, but were surprised to 3.他没有出席会议的原因是他遇到交通堵塞了。 discover that they found more plastic than fish The reason why he didn't attend the meeting “From above, the oceans still look beautiful and was untouched," David said, "but just below the 4.令我惊讶的是通过努力有这么多人打破了世界 surface is this toxic stew that could quickly end up 纪录。 on our dinner plates." so many people The leader, David, organised the voyage in broke the world records with efforts order to draw people's attention to the 5.许多人认为每个公民都应该有良好的举止。 environmental dangers our oceans face and the Many people have the idea need to recycle plastic. He planned to visit damaged 40 coral reefs and islands in danger from rising sea rise, endangers species and influences weather levels. However, his most important objective was patterns. to see the Great Pacific Garbage Patch, a huge But tracking the warming is tricky. Ship-based mass of plastic particles floating in the North observations capture only snapshots in time over a Pacific. David hoped that, by sailing through the tiny portion of the water. Satellite observations Patch, he could show the world how serious plastic cannot enter very deep below the surface. The most pollution had become. detailed picture of ocean heat comes from Argo. Unfortunately, the Plastiki was more difficult which can drop down to around 6, 5oo feet. But to control than expected. Therefore, the boat there are only about 4,ooo such floats, and they missed its main destination. However, the crew did cannot sample deeper parts of the ocean make stops at islands in the mid-Pacific, where In a paper published in Science, researchers they picked up supplies and talked to local compared the travel speeds of sounds produced by students. Along the way, they battled fierce ocean undersea earthquakes to detect ocean warming over storms, torn sails and temperatures that reached wider areas. Because sound travels faster in warmer up to38C. water, differences in speed can reveal changing When the Plastiki finally sailed into Sydney's temperatures. "They're opening up a whole new harbour, the crew were greeted by cheers. The area of study,"says geophysicist Frederik Simons Plastiki's journey had shown that if we understand Inspired by those early efforts to measure how to use waste materials efficiently, they can be ocean heat with sound, Caltech researcher Wenbo transformed into valuable resources. It had also Wu thought to monitor low-frequency sound waves revealed that it was more important than ever to sent out by earthquakes below the seafloor. "I deliver a serious message: our oceans are filling up know these earthquakes are very y powerful with plastic faster than we thought. sources,"Wu says,"so why not try to use the 1. What was special about the Plastiki? earthquakes?" A. It had high-tech equipment. He and his team tested the idea near B. It was made of green materials. Indonesia's island of Nias, where the Indo C. It once crossed the Pacific Ocean. Australian Plate is bumping under the Sunda D. It had a professional crew on it. Plate. The researchers gathered sound data from 4. 2. What was the purpose of the Plastiki's voyage? 272 earthquakes of magnitude 3 or greater from A. To protect endangered ocean life. 2004 to 2o16, and they compared sound wave B. To test the safety of a new boat. speeds from quakes that originated in the same C. To stop people using plastic products. spot over the years. By modeling the differences. D. To highlight the plastic waste problem. often just fractions of a second, they found that 3. Which of the following best describes Plastiki's the ocean near Nias was warming by about 0. 08 voyage? degree Fahrenheit per decade - more than the A. Boring but carbon-free. 0. 047 degree F suggested by Argo's data. Less B. Controversial but fruitful. than one degree F does not sound large, but it C. Aimless but comfortable. takes considerable heat to warm the entire eastern D. Challenging but significant Indian Ocean. 4. What message is conveyed in the last paragraph? The new method is promising, says A. Limited resources should be valued. oceanographer Bruce Howe. Meanwhile Simons and B. Actions must be taken by individuals. his colleagues are exploring an alternative C. Plastic waste can be turned into treasure. technique, employing dozens of underwater D. Environmental problems can be easily solved. microphones called hydrophones to catch more B earthquake sounds. He notes that finding out the Sound may offer a creative way to take the floats' precise locations will be challenging, ocean's temperature. Climate change is steadily however.“Overcoming such challenges would fill warming the seas, which have absorbed about 90 in important gaps," Wu says. "We really need percent of the excess heat trapped by greenhouse different methods of gathering the data as much as gases. This warming contributes to the sea-level possible."he adds. 41 ·英语·选择性必修 第四册(配WY版) 5. What do people do to take ocean's temperature? trenches, creating unpredictable conditions. 4 A. Ships sail across all the ocean to take photos. People travel in this area in craft that are too small B. Satellites are used to provide data on ocean to withstand the conditions, and are without the heat. experience to respond in a satisfactory way when C. Argo enters the deepest seas for detailed conditions change. pictures. The US Coast Guard prefers to dispel any idea D. The numbers of floats hit a record high for of supernatural forces at play. 5 They think samples. that human error, natural forces, and coincidence 6. Why can sound be a method for detecting ocean are reasons responsible for these unsolved warming? disasters. A. Because its speed varies with the temperature A. They would have run low on fuel. of water. B. They prefer to accept a logical viewpoint B. Because it accompanies earthquakes below the C. There are two schools of thought on these seafloor. disappearances. C. Because it is approved by researchers. D. The disappearance of the search plane was much D. Because its value has been proved by previous stranger. efforts. E. In addition to environmental causes is the 7. What is the similarity between the studies by concept of human error. Wu and Simons? F. A more logical way of thinking is to consider the A. They use hydrophones as floats. many natural explanations. B. They exchange their data with Argo. G. And it is famous for the unexplained C. They meet the same trouble at work. disappearances of many ships and airplanes. D. They employ new research methods. 8. What is the best title for the passage? III.语法填空 A. Undersea Earthquakes Today, much of the world's ocean is still a mystery. Only 5 percent of it 1. (explore) B. Climate and Seas C. Sound and Ocean Heat so far. In fact, we know more about some areas of Mars2. D. New Method Found some parts of the world's ocean. New technology, however, is helping II.七选五 scientists explore these 3. The Mystery of Flight 19 (hide) worlds. The name "Bermuda Triangle"as it is referrec For example, scientists are using an underwater to by some is an unofficial title for the triangular vehicle called DeepSee to explore seamounts- underwater mountains. Scientists area of the Atlantic between Florida, Bermuda. ; have used and Puerto Rico. The area covers over a million DeepSee to study Las Gemelas, an area of square kilometres of the ocean. 1 Among them seamounts near Costa Rica. A huge variety 4. is the mysterious disappearance of all the planes of species live around Las Gemelas. Some of these species may have chemicals 5. the US Navy, Flight 19. can 2 One is the popular belief that help people fight illnesses. The6. supernatural forces were at play. Some theorize (deep) location of the earth that aliens took away the craft and sent them to is the Mariana Trench in the Pacific Ocean. The another planet. Some theorize that monsters were ocean floor there is about 11,ooo meters deep. In doing their handiwork. One thing is certain. There 2012, filmmaker and explorer James Cameron were very strange forces at work during these 7. (reach) the Mariana Trench in a logical theories and disappearances. and 0 vehicle called Deepsea Challenger. He was the first explanations have fallen short of satisfying 8. (complete) the journey alone. Cameron skeptics. took9. (photo) and made videos on the 3 This part of the Atlantic is subject to ocean floor. Deep-sea exploration also helps us in sudden storms. The Gulf Stream, which flows other ways. For example, we are learning how through this part of the Atlantic, can quickly erase underwater earthquakes cause tsunamis(海啸). As evidence of disasters from the sea. On the ocean Cameron says, "This is the beginning , of floor, there is a mixture of shoals(浅滩) and deep 10. (open) up a new frontier." 42e II.1.expansion 2.ruins 3.corresponding 4.has been Ⅱ.[语篇解读门本文是一篇记叙文。文章讲述了马特·斯 applied 5.on 6.was dismissed 7.buried 8.applicants 塔茨曼虽生来没有手智但后来通过自己的努力成为美国顶 applications apply 9.at 10.abandoned 级的号箭手之一的故事。他的成就和励志精神影响着一大 Ill.I.leave the work half done 2.Aimed at improving the 批像他一样残疾的人们。 students'ability of listening and speaking 3.whatever 1.C句意为：他说：“我们上次调查时，世界上1%的弓箭手引 I purchase 靠射箭谋生。”由下文第三段的内客和第10题所在句可知 N.1.has been surrounded 2.impressive 3.understanding 选C项。make a living意为“谋生”，是因定搭配。 4.to 5.that 6.generations 7.to indicate 8.themselves 2.B句意：2010年1月，我决定成为世界上最好的弓箭手 9.unknowingly 10.thinking 根据后句“And by20l2,I went to my first game,and won [层级2素养能力提升] silver!”可知，2010年，他决定成为最厉害的弓籍手 I.A一[语篇解读]本文是一篇记叙文，主要讲述了博 decide to do sth意为“决定做某事”，是固定搭配。故选B 物馆中的一个几十年都无法打开的保险筒竟然被一位游客 3.B句意：“我找不到工作，”他说。根据前一句内容和常识 轻易打开的故事。 可知，因为斯塔茨曼生来就没有手臂，天生残疾，所以不容 l.A誰理判断题。根据第一段第一句“When Stephen Mills 易找到工作。故选B。 spotted a dusty old safe(保险箱)in a museum in Canada, 4.A句意：我很沮丧，因为没有人会给我机会证明自己 he thought he'd try to crack the code(破解密码)，‘iust 由上文“Stutzman was born without arms.”可知，他天生残 like in the movies',”可知，当米尔斯在加拿大的一个博物 疾，没有机会证明自己，应该是非常祖丧。故选A。 馆里发现一个满是灰尘的田保险箱时，他想试试破解密 5.D句意见上一题解析。结合后文内容可知，他是想证明 码，“就像电影里演的那样”。再根据第二段中的“uil 自己虽然残疾，但也能有所作为。故选D。 Mills unexpectedly cracked the code”可知，米尔斯意外破 6.D句意：2009年，在艾奥瓦州的一个猎鹿季，他想，如果 解了密码。由此可知，画线部分（他没指望会有个好菜坞 他能自学如何射箭·也许他至少可以猎一只鹿养家糊口 式的结局)指的是他没有想到自己会破解密码，打开保险 结合后文“I actually shot a deer'”可知，此处表达“射箭” 箱。故选A。 故选D。 2.C如节理解题。根据第二段中的“Staff knew it had come 7.C句意见上一题解析。由后文“shot a deer”可知此处表 from the long-gone Brunswick Hotel and was donated to 示“猎鹿”，故选C the museum in the 1990s,but its code and contents 8.D句意：他说：“我出去买了我能找到的最便宜的弓，我确 remained a mystery for decades-until Mills unexpectedly 实成功地射中了一只鹿，这让我很激动。”由第二段内容和 cracked the code..”可知，这个保险箱来自消失已久的不伦 本段中的“maybe he could at least a deer and 瑞克酒店，在20世纪90年代被捐赠给了这个博物馆，但 它的密码和里面的东西几十年来一直是个链，直到来尔斯 support his family”可知，他没有工作，想靠猎鹿来养家糊 意外破解了密码。由此可知，自从它被带到博物馆很长时 口·家里应是非常贫因，所以他要买最便宜的弓。故选D。 间以来一直都是关闭着的。故选C 9.D句意见上一题解析。由后文“I was excited.”可知，他 3.A推理判断题。文章主要讲述了一位游客意外打开了 应该是成功射中了一只鹿。故选D 博物馆中的一个很长时间都无法打开的保险箱。由此可 l0,A句意：我开始射箭只是为了养家糊口。feed意为“养 推断，作者写本文就是为了给我们讲述一个有趣的故事 活”；entertain意为“招待”：satisfy意为“使满意”：reward 故选A。文章不是侧重告诉读者如何打开保险箱，也不是 意为“奖励”。此处相当于上文的“support his family(养 为了促进博物馆的旅游或鼓励人们学习机械知识，故B 家糊口)”。故选A。 C,D项不正确。 11,B此句暗含斯塔茨受在一次成功后有了更大的想法，和 4.B主旨大意题。根据第二段中的“Staff knew,.,its code 后文叙迷他影响身边人是相联系的。故选B。 and contents remained a mystery for decades-until Mills 12.C句意：当一个残疾人走过来对我说，他们看到我这样 unexpectedly cracked the code,”可知，孩保险箱的密码和 或那样做，现在他们可以那样做了，这让我对自己感觉很 里而的东西几十年来一直是个谜，直到米尔斯意外破解了 好…本句暗含斯塔茨受的付出得到了认可，也在影响 密码：再结合文章主要讲述了博物馆中的一个几十年都无 其他残疾人，这让他感觉良好。故选C。 法打开的保险箱竟然被一位游客意外打开的故事可推断 l3.A句意：这种感觉比胜利更好，由上文“When someone 出，文章告诉我们生活充满了惊喜。故选B。 with a disability comes up to me saying they saw me do B一—[语篇解读]这是一葛说明文。文章主要介绍了赫库 this or that,and now they can do that.,.”可知，这种认 兰尼姆卷轴被认为包含了古希腊重要思想家的作品，因为它 可比获奖更开心。故选A。 们在公元79年的一场自然灾害中变成了碳，所以不能供人 14.B句意：世界上最好的弓箭手是改变这项运动并让它变 们长时间地阅读。但是研究人员利用机器制造出比太阳亮 得更好的人，或者是改变那些看到你的所作所为并让他 100亿倍的光，使其穿过赫库兰尼姆卷轴来阅读这些卷轴里 们变得更好的人。结合下文“or changes people”可知， 的内容。 change为原词复现，符合语境。故选B. 5.B推理判断题。根据第一段可知，赫库兰尼坶卷轴被认 l5.A句意见上一题解析。结合上文“When someone with 为包含了古希腊重要思想家的作品。但卷轴无法展开 a disability comes up to me saying they saw me do this or 即使是微风也有可能使它们化为尘土。原因是它们在公 t小at”可知，斯塔茨曼的努力影响了那些看他做事的人 元79年的一场自然灾害中变成了碳。由此可知，赫库兰 故选A 尼母卷轴不能供人们长时间地阅读。故选B。 作业（十四）SectionⅡUsing language 6.B段落大意期。根据第二段第一句可知，现在肯塔基大 学的研究人员发现了一种不用触摸就能看到卷抽内部内 [层级1基础知识自测] 容的方法。由此可知，第二段主要介绍的是读取赫库兰尼 I.1.to paint 2.out 3.to worry 4.that 5.What how 姆春轴内容的新方法。故选B。 6.where 7.how/why 8.whom 9.where 10.what 7,B细节理解题。根据第三段最后一句可知，这些卷轴是 Il.1.would appreciate it if you could give us some advice 用金属墨水书写的，科学家并不知道在书写卷轴的时候有 2.Whether the sports meeting will be held tomorrow what 这种书写技术的存在；根据第四段“这表明我们应该告诉 the weather is like 3.that he had been caught in a traffic 自己，我们一做完某些研究就认为自己完全知道了某些事 jam 4.What makes me surprised is that 5.that every 情的态度可能是不对的。”可知，ESRF的科学家更多地了 citizen should have good manners 解了古代的信息记录方式。故选B。 llI.1.whether 2.that 3.What 4.that 5.what 6.that 8.A推理判所题。根据最后一段可知，这一发现不仅具有 7.that 8.How 9.Whether 10.what 历史意义，可能代表了这位伟大思想家留下的仅有的完整 层级2素养能力提升 著作。谁知道卷轴中还可能存在哪些其他伟大的著作？ 1,A一[语篇解读]本文是一篇记叙文。文章讲述了 由此可知，本段提到了克吕西普的作品是为了展示赫库兰 2010年，一组六人的船员乘坐回收的塑料瓶制成的船穿越 尼姆卷抽可能很有价值。故选A。 太平洋的故事。 20 @ 1.B细节理解题。根据第二段中的“They sailed on the:5.B下文是对设空处的补充说明。根据上文“The US Plastiki,,the bottles in place.”可知，Plastiki号是由绿色 Coast Guard prefers to dispel any idea of supernatural 材料（环保材料）制成的。故选B。 forces at play.”以及下文“They think that human error, 2.D推理判断题。根据第四段中的“However,his most natural forces,and coincidence are reasons responsible for important objective.,.pollution had become..”可知，他们 these unsolved disasters.”可知，美国海岸警卫队主张消除 航行的目的是强调塑料垃圾问题。故选D。 那些超自然力量的观点，更倾向于接受合乎逻辑的观，点。 3.D推理判斯题。根据第五段内容以及最后一段中的“Te 故选B。 Plastiki's journey had shown..raluable resources."可以推知， Ⅲ.[语篇解读]本文是一篇说明文。文章介绍了世界上的 Plastiki号的航行具有挑战性但意义重大。故选D, 大部分海洋仍然是个谜，新技术正在帮助科学家探素这些隐 4.C推理判斯题，根据最后一段中的“The Plastiki's 藏的世界。 journey had shown that,valuable resources."可推知，塑 l.has been explored考查动词的时态、语态和主谓一致 料垃圾可以变成财富。故选C 根据so「ar可知，句子时态用现在完成时，又因主谓之间 B 一[语篇解读]本文是一篇说明文。文章主要介绍了利 是被动关系，应用被动语态，且主语5 percent of it是单 用声音测量海洋温度的相关内容。由于声音在不同温度的 数，所以用现在完成时的被动语态has been explored。 海水中传播速度不一样，所以能用它检测海洋变暖。 2.than考查介词。根据more修饰比较级可知，空处应用 5.B节理解题。根据第二段中的“Satellite observations 表示比较的介词than cannot enter very deep below the surface."可知，人们会利 3.hidden考查形容词。根据worlds可知，空处应用形客词 用卫星去收集海洋温度方面的数据，故B项正确。根据第 作定语。 二段中的“Ship-based observations capture only snapshots 4.of考查介词。a huge variety of是固定短语，意为“各种 in time over a tiny portion of the water.”可知，船只能检测 各样的” 到一小郎分水域，故A项错误：根据第二段中的“The mos1 5.that which考查定语从句。分析句子结构可知，空处引 detailed picture of ocean heat comes from Argo ..they 导定语从句，从句中缺少主语，先行词chemicals指物，应 cannot sample deeper parts of the ocean,”可知，Argo不能 用关系词that或which。 进入最深的海城，故C项错误：D项文中未提及 6,deepest考查形容词的最高级。the后跟形容词的最高级 6.A如节理解题。根据第三段中的“Because sound travels 修饰名词location faster in warmer water,differences in speed can reveal 7.reached考查动词的时态。根据In2012可知，句子描迷 changing temperatures.”可知，由于声音在不问温度的水 过去的动作，应用一般过去时reached。 域传播速度不同，所以速度之间的差异可以显示温度的变 化，因此，声音可以被用来检测海洋变暖，故A项正确。 8.to complete 考查非谓语动词。the first后用动词不定式 作后置定语。 7.D鈿节理解题。根据第四段中的“(Caltech researcher Wenbo Wu thought to monitor low-frequency sound waves 9.photos考查名词复数，photo是可数名词，前面无冠词， sent out by earthquakes below the seafloor."和最后一段中 因此应用名词复数photos. "Meanwhile Simons and his colleagues ..more 10.opening考查非谓语动词。of为介词，其后应用动名词 earthquake sounds..”可知，Wu和Simons都使用了新的研 作宾语 究方法，故D项正确。 作业（十五） SectionⅢ Developing ideas 8.C标题归纳题。根据本文的中心句“Sound may offer a Presenting ideas creative way to take the ocean's temperature.”和其他内容 [层级1基础知识自测] 可知，本文主要介绍了利用声音刚量海洋温度的研究方 I.1.substances 2.Furthermore 3.upwards 4.drilling 法，故C项最适合作本文的标题 5.millimetre Ⅱ，[语篇解读]本文是一篇说明文，文章介绍了人们对美 II.1.substances 2.drilling 3.into 4.beyond 5.to 国Figh119飞行中队在百慕大三角消失的原因持有的不同 6.stands 7.notably 8.for 9.to complain complaining 观点。 10.for 1.G设空处下文提到其中之一是美国Flight19飞行中队 lll.1.It is hoped that these discoveries can offer a new 的神秘消失，由此推知设空处说的是“Among them”中的 window into 2.If necessary 3.Along the road are thick thm的情况。分析选项可知G:项与下文衔接紧密，下文 是G项中所说的“许多船和飞机神秘消失”的其中一个例 and tall trees 子，且G项中的“unexplained disappearances'"与下文中的 I.1.that 2.to explore 3.are made 4.darkness “mysterious disappearance"对应，下文中的“them”指代G 5.Amazing 6.the 7.completely 8.as 9.conducted 10.taking 项中的“unexplained disappearances of many ships and airplanes'”。故选Ge [层级2素养能力提升] 2.C 根据下文中的“One is the popular belief that 「，A一[语篇解读]本文是一篇说明文。文章主要介绍 supernatural forces were at play.""Some theorize that... 了一项发现玛雅建筑的新技术。 Some theori2 e that...,”可知，本段讲的是人们对神秘消失 1.A 推理判斯题。根据第一段中的“Some60,000 事件的看法。分析选项可知，C项中的“these buildings were found over the past two years”和第二段中 disappearances”承接上一段最后提到的种秘消失现象，C 的“These findings were a‘breakthrough in Maya 项中的“two schools of thought on these disappearances" archaeology'”可知，Canuto认为这些新发现是一个重大的 又引出下文关于神秘消失现象的观点，是对下文的概括， 突破。A项最符合Canuto的观，点，故选A。 承上启下，待合语境，故选C 2.D细节理解题。根据倒数第二段内容可知，利用这项技术研 3.上一段介绍了人们关于神秘消失事件的其中一种观 究人员可以远程探索玛雅建筑，不用去丛林中了。故选D。 点.，根据下文中的“This part of the Atlantic is subject to 3.D细节理解题。根据第五段中的“Researchers now sudden storms...unpredictable conditions."可知，下文提 believe that the Maya had a population of 10 million. 到的内容都是从自然科学的角度给出的解释。分析逸项 which is much higher than previous judgment”可知，玛雅 可知F项将前后两种观，点进行了比较，说明从自然科学角 可能人口众多。故选D 度给出的解释比上文中提到的超自然力量更合乎逻料，承 4.B推理判斯题。根据文章的篇章结构可知，文章第一，二 接上文，同时引出下文对自然科学角度的解释的介绍，承 段引出了一项技术并说明了它的重要作用，第三、四，五段 上启下，符合语境。故远下。 通过列举利用这顷技术发现的情况来突出这项技术的作 4.E根据下文中的“People travel in this area,,,when 用，第六、七段介绍了这项技术的工作原理和优，点。由此 conditions change..”可知，下文对人为固素进行了介绍。E 可知文章的主要目的是介绍这项新技术。故选B。 项承接上文的环境因素，同时引出下文对人为因素的介 B 一[语篇解读]本文是一篇说明文。考古学家在类国爱 绍，承上启下，说明除了上文提到的自然因素之外，还有人 达荷州西部发现的一个远古遗址被证明是美洲已知最古老 为因素在内。故选E。 的人类定居点之一。 21