2021-22学年高二版第7期总第844期答案与解析
D1 1-3 CBC
D2 1-3 ACD
D3 1-3 ACA
D4 1-3 BDA
D5 1-5 GCADF
解析：
D1-3 CBC
1. C。根据文章第4段第2句“In 1905, Grigorov discovered one of the main bacteria in Bulgarian yogurt, Bacillus bulgaricus, the lactic acid bacterium responsible for transforming milk into yogurt.”和第5段第1句“So Metchnikoff came up with a theory that lactic acid is good for human health and can prolong human life.”可知，酸奶中含有的保加利亚杆菌是一种乳酸菌，而乳酸对身体好，可以益寿延年，可得酸奶对身体好是因为含有保加利亚杆菌，故本题选C。
2. B。根据文章第6段最后一句“Both of his parents were physicians, giving Sikorsky the scientific grounding that he needed to develop aircraft ideas.”可得伊戈尔·伊万诺维奇·西科斯基的目标是造一架飞机，故本题选B。
3. C。根据文章第8段最后一句“It is one of the most powerful icons in science: a single document that consolidates much of our knowledge of chemistry.”可得元素周期表的意义在于它整合了大部分化学知识，故本题选C。
D2 1-3 ACD
1. A。根据文章第4段第2句“One of the main advantages of studying in Russia is its relatively cheaper tuition fees and living costs than in Europe or North America, …”可得留学俄罗斯的好处之一是学费和生活费用比较低，故本题选A。
2. C。文章第6、7段讲了两位留学生在留学俄罗斯的过程中获得的成长，以及这些成长在他们后来就业中发挥的积极作用，因此这两段主要内容是留学俄罗斯的好处，故本题选C。
3. D。根据文章第11段“‘To my surprise, Kristina proudly told me that she also had family who took part in World War II ... I’ve learned a lot about World War II. Yet never had I felt such a strong bond with another country until I talked to a young Russian about our own different, yet similar, histories,’ Qu said in her speech.”可知这里提到的情感联系是两个人的家人都曾在二战中参与战斗，故本题选D。
D3 1-3 ACA
1. A。从文中第二段“In this story, people wear virtual reality (VR) headsets to see and join the metaverse.”和第三段“Now, the fictional technology in the book is becoming a reality.”可知，要进入元宇宙，人们必须佩戴虚拟现实头盔，故答案为A。
2. C。从文中倒数第四段“people … would be connected at all times.”可知，在元宇宙，人们每时每刻都是相互联系着的，故答案为C。
3. A。通读全文可知，本文主要对元宇宙—一个虚拟的共享世界，进行了报道，故答案为A。
D4 1-3 BDA
1. B。从第二段“... mangoes are sent as gifts ...”可知正确答案为B。文中并未提到芒果在印度的价格，故A错误；第二段最后一句可知，芒果是印度和巴基斯坦之间表达善意的物品，所以会挑选最好的芒果送出边境，以庆祝两国的独立日，故C、D均错误。
2. D。在第四段中，作者回忆起了在家乡和芒果有关的童年趣事，如三月下旬上学路上闻到芒果树花香，四月和朋友一起摘生芒果，坐在屋顶蘸着粉盐和红辣椒粉吃，故正确答案为D。
3. A。从文章最后两段可知，作者借此文回忆了有关芒果的趣事，并表达了自己因为疫情无法回国的难过心情，和对家乡的思念，故正确答案为A。
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