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1、 Unit 2Healthy eating.阅读理解A(2018银川检测) Crossing your legs is an extremely common habit; most people dont even notice that theyre doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of. A
2、 study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason for this is that the blood in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance, mak
3、ing it even harder for the blood to circulate. This causes your body to increase your blood pressure to push the blood back to the heart. You wont feel any immediate effects, but repeated, drawnout increases in blood pressure can cause longterm health issues. So, planning to sit for a long period of
4、 time? Dont keep your legs crossed. “Crossing your legs at the knee can also cause pressure on the major nerve in your leg that passes just below your knee and along the outside of your leg，” explains Richard Graves, a medical expert. This pressure can cause numbness and temporary paralysis (麻痹) of
5、some of the muscles in your foot and leg, preventing you from being able to raise your ankle what we know as that “pins_and_needles” sensation. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage. So next
6、time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.【文章大意】本文是一篇说明文。文章介绍了人们将一条腿放在另一条腿上(跷二郎腿)的习惯，这种行为会导致一些健康问题。【难句分析】The reason for this is that the blood
7、 in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance, making it even harder for the blood to circulate.(第二段第二句)分析：本句是一个主从复合句。两个that引导的都是表语从句，“making it.to circulate”为现在分词短语作结果状语。译文：这是因为腿部的血液要回流到心脏，就要与重力对抗，并且把一条腿放在另一条腿
8、上会加剧这种对抗，这使得血液循环更难了。1What can we learn about crossing ones legs?AIt is a very bad social habit，BIt can do harm to peoples health.CIt is usually practiced deliberately.DIt can make others feel uncomfortable.答案与解析：B考查细节理解。根据文章前三段内容可知，人们将一条腿放在另一条腿上(跷二郎腿)会使血压上升，给腿部和脚部的某些神经带来压力，引起健康问题。故选B项“它可能对人们的健康有害处”。
9、2According to the study, sitting with your legs crossed can _.Aaffect your blood pressureBresist gravity effectivelyClead to heart attacks easilyDimprove the function of legs答案与解析：A考查细节理解。根据第二段第一句“A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase
10、your blood pressure.”可知，一项研究表明跷二郎腿会影响血压。故选A。3In the third paragraph “pins and needles” probably means _.Abeing highly flexibleBbeing a little tiredCserious muscle injuries Dslight sharp pains答案与解析：D考查词义猜测。根据上文可知，将一条腿放到另一条腿上所产生的这种压力会使得脚部、腿部某些肌肉无知觉、麻痹。故选D项“轻微的刺痛”。4What is the main purpose of the text?
11、ATo compare common habits.BTo evaluate the effects of an experiment.CTo give readers some advice.DTo introduce research methods.答案与解析：C考查写作意图。通读文章内容可知，文章介绍将一条腿放在另一条腿上所导致的健康问题，旨在建议读者不要跷二郎腿。故选C。B(2018合肥市高三调研性检测)The effects of coffee consumption on health have long been a subject of conflict and uncert
12、ainty. Since the 1980s, some have spoken out against coffee as its harmful to health, while others have welcomed coffee for its supposed benefits to health. According to a scientific report, mild coffee consumption, three to five cups per day, can be taken as a healthy dietary pattern, along with ot
13、her healthful behavior. The report also says that coffee consumption helps reduce the risk of heart disease and it protects against Parkinsons disease.According to Dr. Donald Hensrud of Mayo Clinic, high consumption of coffee has health risks. Dr. Hensrud mentions the dangers of high coffee consumpt
14、ion for people with a certain illness that slows the breakdown of caffeine in the body. Some studies said that drinking two or more cups of coffee daily can actually increase the risk of heart disease in these people. According to conclusions from a recent study led by Dr. Gregory Marcus, a doctor f
15、rom the University of California, San Francisco, daily moderate consumption of caffeine, less than 4 cups, is not associated with these issues. Until the scientific community reaches a general agreement on the effects of coffee consumption on human health, it will be up to the individual to decide w
16、hether the benefits of drinking coffee are greater than the risks.When informed of these possible health benefits and harm of drinking coffee, Harwood, a high school student stated, “Even though there might be some negative effects of drinking coffee, for the most part, coffee drinking sounds good for health. Not to mention I need c
