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1、Unit 4 Pygmalion.阅读理解ADo Perus potatoes have the right stuff? Thats the question scientists will be asking in Lima next month, when a selection of potatoes will begin undergoing tests to determine whether they are fit to grow on Mars.NASA, the US space agency, is conducting the pioneering experiment
2、 together with Limas International Potato Center.They will cultivate a hundred selected varieties in Marslike conditions that could eventually pave the way for building a dome on the Red Planet for farming the vegetable. Of the selected candidates,40 are native to the Andes Mountains, conditioned to
3、 grow in different ecological zones, can stand sudden climate changes and reproduce in rocky areas. The other 60 are improved varieties, able to survive with little water and salt. They are also immune to viruses.Those that pass the tests must meet a final criterionthey must be able not only to grow
4、 well on Mars but also reproduce in large quantities. “Were almost 100 percent certain that many of the selected potatoes will pass the tests，” said Julio Valdivia Silva, a Peruvian NASA astrobiologist (太空生物学家)who is taking part in the ambitious project. The scientists plan to transport 100 kilos of
5、 soil to a lab in Lima that will simulate the complex Martian atmospherewhich contains mostly carbon dioxideand expose it to extreme ultraviolet(紫外线的) radiation. If the varieties selected for next months experiment dont adapt to the desert soil, the researchers will introduce nutrients, which will b
6、e provided by radiation.In future years, NASA plans to build a Mars research center in the Peruvian desert. It would create a perfect copy of the Martian landscape and atmosphere for future research into space farming that could serve manned missions to Mars and other planets in the solar system.语篇解
7、读本文为一篇新闻报道。美国国家航空航天局(NASA)将与国际马铃薯研究中心联手，进行一项开创性实验。1What is the best title of the passage?ATransport potatoes to PeruBDetermine the varieties of potatoes in PeruCNASA is to build a Mars research center in PeruDNASA is to simulate growing potatoes on Mars in Peru解析：标题归纳题。通读文章可知美国国家航空航天局(NASA)计划与国际马铃薯研
8、究中心联手，进行一项开创性实验，即在秘鲁培育可在火星上种植的土豆。故答案为D项。答案：D2According to the third paragraph, which of the following statements is TRUE?AForty kinds of potatoes can survive with little water and salt.BMany types of potatoes to be planted on Mars are developed in Peru.CSixty varieties native to the Andes Mountains
9、can stand sudden climate changes.DThe final criterion is that all the candidates are immune to viruses on the earth.解析：细节理解题。根据第三段第一句“They will cultivate a hundred selected varieties in Marslike conditions that could eventually pave the way for building a dome on the Red Planet for farming the veget
10、able.”可知B项正确。根据第三段中的“The other 60 are improved varieties，able to survive with little water and salt.”可排除A项；根据第三段中的“Of the selected candidates,40 are native to the Andes Mountains，conditioned to grow in different ecological zones，can stand sudden climate changes and reproduce in rocky areas.”可排除C项；根据
11、第三段中的“Those that pass the tests must meet a final criterionthey must be able not only to grow well on Mars but also reproduce in large quantities.”可排除D项。答案：B3What if the selected varieties dont adapt to the desert soil in Peru?AAstrobiologists will be sent there to help.BNutrients will be provided t
12、o plants by radiation.CA Mars research center will be built for further study.D100 more kilos of potatoes will be directly sent to Lima.解析：细节理解题。根据第三段最后一句“If the varieties selected for next months experiment dont adapt to the desert soil，the researchers will introduce nutrients，which will be provide
13、d by radiation.”可知答案为B项。答案：B4The passage may be in the column of China Daily.AscienceBsportsCtourismDentertainment解析：推理判断题。本文介绍的是美国国家航空航天局(NASA)将与国际马铃薯研究中心联手，进行一项开创性实验，属于科普类文章，故答案为A项。答案：ABSome people call it a traveling museum. Others refer to it as a living or openair museum. Built in Brazil to hon
14、or Columbus first voyage to the New World, the Nina, a Columbusera replica (复制品) ship, provides visitors with an accurate visual of the size and sailing equipment of Columbus favorite ship from over 500 years ago.I joined the crew of the Nina in Gulf Shores, Alabama, in February 2013. As part of a r
15、esearch project sponsored by my university, my goal was to document my days aboard the ship in a blog. I quickly realized that I gained the most valuable insights when I observed or gave tours to schoolage children.The fieldtrip tour of the Nina is handson learning at its best.In this setting, stude
16、nts could touch the line, pass around a ballast stone (压舱石), and move the extremely large tiller that controlled the direction of the ships in Columbus days. They soon came to understand the labor involved in sailing the ship back in his time.I was pleased to see the students become active participants in their learning process.The Nina is not the only
