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1、Unit 2 Working the land.阅读理解2017安徽淮南二模Do 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 pioneerin
2、g experiment 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，cond
3、itioned to 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 t
4、o grow 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 kilo
5、s of 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
6、 be 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.1Wh
7、at is the best title of the passage?ATransport potatoes to Peru.BDetermine the varieties of potatoes in Peru.CNASA is to build a Mars reseach center in Peru.DNASA is to simulate growing potatoes on Mars in Peru.2According to the third paragraph，which of the following statements is TRUE?AForty kinds
8、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 can stand sudden climate changes.DThe final criterion is that all the candidates are immune to viruses on the earth.3What if the selec
9、ted varieties dont adapt to the desert soil in Peru?AAstrobiologists will be sent there to help.BNutrients will be provided to plants by radiation.CA Mars research center will be built for further study.D100 more kilos of potatoes will be directly sent to Lima.4The passage may be in the_column of Ch
10、ina Daily.Ascience BsportsCtourism Dentertainment答案：解题导语本文为新闻报道。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。1D解析：主旨大意题。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。2B解析：事实细节题。根据第三段第一句They will cultivate a hundred selected varieties in Marslike conditions that could eventually pav
11、e the way for building a dome on the Red Planet for farming the vegetable.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
12、stand sudden climate changes and reproduce in rocky areas.可排除C项；根据第三段中的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。3B解析：事实细节题。根据第三段最后一句If the varieties selected for next months experiment dont adapt
13、 to the desert soil，the researchers will introduce nutrients，which will be provided by radiation.可知答案为B项。4A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。.阅读填空2017河北衡水中学期末Tips to Ease MigrainesIf youve ever experienced migraine headache，you know that its no walk in the park.Mig
14、raines are a very painful type of headache，and often felt on one or both sides of a head.Some people experience migraines every now and then，while others get them more than once a week._1_Although they are not dangerous to life，migraines can seriously affect ones ability to function throughout the d
15、ay.Here are four tips for easing migraines.1.Learn to manage.Migraines are often caused by stress，so try not to get stressed out easily.Avoid using the computer for too long and going to bed late at night.Learning stress management techniques can reduce and even prevent the pain of a migraine headac
16、he._2_If you prefer to practice relaxation at home，then try lying down on your bed or sofa and closing your eyes.Take slow，deep breaths and focus on relaxing each muscle group one at a time until you feel relaxed every single muscle in your body.2Use ice massage (按摩)Another solution is the “ice massage”Put your fingers into icecold water and then pr
