1、课时作业(十)Unit 4Section Starting out & Understanding ideas.阅读理解AAmerican researchers say drinking tea may help strengthen the bodys defense system against infection. Doctors at Brigham and Womens Hospital in Boston, Massachusetts, did the study. The team studied a chemical found in black, green, oolong
2、 and pekoe tea. This chemical is an amino acid(氨基酸) called Ltheanine. The scientists say it may increase the strength of gamma delta T cells. Thats the letter T, not the drink. Gamma delta T cells are part of the bodys defense. First, the researchers mixed some of these cells with antigens (抗原) foun
3、d in the amino acid. Antigens help the body react to infection. Then the scientists added some bacteria. Within twentyfour hours, the cells produced a lot of interferon (干扰素), a substance that fights infection. Cells not mixed with the antigens did not produce interferon.In the second part of the st
4、udy, eleven people drank five to six cups of black tea every day. Ten other people drank the same amount of instant coffee. That is dried coffee mixed with hot water. Two weeks later, and again two weeks after that, the researchers tested the blood of all twentyone people. They also looked at what h
5、appened when they added bacteria to the blood cells. They found that the tea drinkers produced five times more interferon after they started drinking tea. The coffee drinkers did not produce interferon. Doctor Jack Bukowski led the study. He said the antigens added to the gamma delta T cells were re
6、sponsible for the increased reaction to the bacteria. He said that the study also showed that the cells were able to remember the bacteria and fight them again next time. Earlier research has already found that tea can help prevent heart disease and cancer. Doctor Bukowski says the new study must be
7、 repeated by more people. “If the findings prove to be true，” he says, “then tea drinking might also help protect against bacterial infection.” He says the amino acid Ltheanine could be removed from the tea and used as a drug to strengthen the bodys defense.1We may know from the text that _ can be f
8、ound in different kinds of tea. ALtheanine Bgamma delta T cells Cinterferon Dbacteria2Tea may help strengthen the bodys defense system because it helps _. Ato add some bacteria to the blood cells Bthe body to produce more gamma delta T cells Cthe body to produce more interferon Dto mix antigens with
9、 some of the cells in the body3According to Dr Bukowski, _. Athe findings of the study have already proved to be true Bfurther study is needed to prove the findings true Che has taken some amino acid Ltheanine from tea and made a drug with it Dhe is not sure whether tea can help prevent heart diseas
10、e and cancerB Doctors Without Borders, which was set up in 1971 by doctors and journalists in France, is a humanitarian (慈善的) organization also known as its French name, Mdecins Sans Frontires, and handles emergencies caused by wars, infectious diseases and natural disasters. Today, the group provid
11、es humanitarian medical aid in more than 70 countries. Over 90 percent of its money comes from private sources. In 1999, the group received the Nobel Peace Prize. Living in Emergency: Stories of Doctors Without Borders is a documentary by the movie director Mark Hopkins. It tells the stories of four
12、 doctors and their voluntary work in Liberia and the Democratic Republic of Congo. Mr. Hopkins and his crew filmed the doctors working under some of the most extreme and dangerous conditions. Doctor Tom Krueger from the United States in the film volunteered in Liberia in 2003, after two civil wars.
13、He said, “It was pretty much of a shock when I got here. You cant describe the feeling of the heat in your body and the sweat running down your back, and the smell of the pus (脓) that hits your nose and of unwashed bodies in a closed room.” Another doctor in the film, Australian Chris Brasheer, has
14、been with Doctors Without Borders for nine years. He has served in the Democratic Republic of Congo and spent time in Liberia. He said, “ No water, no electricity, no foodpretty apocalyptic really. ” Doctor Chiara Lepora from Italy also appears in the film. She spent several years working with the g
15、roup. She said, “I will probably return. There are a lot of doctors who are willing to volunteer once, but not many doctors who are willing to repeat their experience. ”4What can we know about Doctors Without Borders?AIt finds peaceful solutions to world problems.BIt provides free medical aid for th
16、e countries in trouble.CMost of its money comes from the government.DIt was started only by doctors in the early 1970s.5Which of the following is true about Living in Emergency: Stories of Doctors Without Borders?AIt is a documentary about Mr. Hopkins crew.BIt tells the stories of 4 doctors from the
17、 same country.CIt is about how Doctors Without Borders was set up.DIt was filmed in countries full of starvation and thirst.6What does the underlined word “apocalyptic” in the fourth paragraph probably mean?ALike the dangerous conditions. BLike the end of the world. CLike the smell of dead bodies. D
18、Like the feeling of sadness.七选五Standing strong for Wuhan In the battle against COVID19, medical workers fight in the front line, while people from all walks of life help pass on love to one another. _1_An infected man goes viral (走红)A man infected with the novel coronavirus became an internet celebr
19、ity (名人) after a video of him went viral. _2_ A medical staff member passes by with a thumbsup. The 39yearold man, surnamed Fu, is a postdoctor teaching at Florida State University in the United States. He came to Wuhan to visit his parents, who were also infected with the novel coronavirus.With lov
20、e from El Salvador_3_ On Feb. 7, 11yearold Javier Castellano and his 13yearold sister Valeria painted a picture to send their blessing as China fights to contain the deadly coronavirus. _4_ Valeria said that she heard about the epidemic on the news and she believed that China would overcome this hug
21、e challenge.Up and runningOn Feb. 4, medical workers transferred patients to the newlybuilt Huoshenshan Hospital in Wuhan. _5_ The city government investigated (调查) coronavirusinfected citizens in local communities and transferred critical cases to the hospital. “The diagnosis (诊断) of patients is sp
22、eeding up，” Xiong Wei, deputy director of Dewang Community Neighborhood Committee, told Xinmin Evening News.AEl Salvador is a heavily populated country in North America.BChina is receiving support from around the world, including El Salvador.CTake a look at the following touching moments!DThis speci
23、al emergencyresponse hospital was built in 10 days and has a capacity (容量) of 1,000 beds.EIn the video, he can be seen reading Francis Fukuyamas The Origins of Political Order at Jianghan Cabin Hospital.FThe video showed what the life was like in the new hospital with some patients dancing and some
24、others reading or shooting pictures.GTheir painting says, “Come on, China! El Salvador loves China.”课时作业(十).阅读理解A【语篇解读】这是一篇说明文。文章主要讲的是喝茶可以增强身体对感染的抵御能力，因为茶可以使身体制造出更多的干扰素。1答案与解析：A细节理解题。根据第一段中的The team studied a chemical found in black, green, oolong and pekoe tea. This chemical is an amino acid(氨基酸)ca
25、lled Ltheanine.可知，不同的茶里面都有的物质是Ltheanine，故选A。2答案与解析：C细节理解题。根据第二段中的“Within twentyfour hours，the cells produced a lot of interferon(干扰素), a substance that fights infection.”可知茶有助于加强身体的免疫系统是因为它可以使身体制造出更多的干扰素，故选C。3答案与解析：B细节理解题。根据最后一段中的Doctor Bukowski says the new study must be repeated by more people.可知D
26、octor Bukowski认为要证明这个发现是对的，还需要更多的研究，故选B。B【语篇解读】本文介绍了无国界医生组织，以及相关纪录片Living in Emergency: Stories of Doctors Without Borders所描述的医生在利比里亚和刚果民主共和国恶劣环境中的救援经历。4答案与解析：B考查细节理解。根据第一段中的“Doctors Without Borders，which was set up in 1971 by doctors and journalists in France, is a humanitarian(慈善的)organization als
27、o known as its French name, Mdecins Sans Frontires, and handles emergencies caused by wars, infectious diseases and natural disasters”可知，无国界医生组织是一个为战争、传染病及自然灾害的受害者提供紧急医疗救援的慈善机构。5答案与解析：D考查细节理解。根据第二段中的第三句和下文中 Chris Brasheer 医生的讲述“No water，no electricity，no food”可知D项正确。6答案与解析：B考查词义猜测。根据第四段中的“He said，No
28、 water，no electricity, no foodpretty apocalyptic really”可知，没有水，没有电，没有食物，即表示状况十分糟糕。故B项最贴合文意。apocalyptic“似末世的，像世界末日的”。.七选五【语篇解读】在抗击新型冠状病毒肺炎疫情的战斗中，医务人员奋战在第一线，各行各业的人帮助彼此传递爱心。1答案与解析：C第一段最后一句需要起到引出下文的作用，下文中介绍了几个抗击疫情的暖心时刻，故选C。2答案与解析：E根据上一句中“a video of him went viral”可知本句应介绍视频内容，说明他为什么出名。故选E。3答案与解析：B根据本段标题“With love from El Salvador”，并结合下文内容可知，首句应当是这一段的主题句。故选B。4答案与解析：G根据上一句中“painted a picture to send their blessing”可知选G。5答案与解析：D上一句提及“the newlybuilt Huoshenshan Hospital”，本句应解释火神山医院的基本情况。故选D。
