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1、2023-2024学年度第二学期期末考试高二英语
2、2024至2024高二下学期期末英语答案
3、2024高二英语下学期期末考试
4、2024年高二下学期期末考试英语试题答案
5、2023-2024学年高二上学期期末考试英语试卷
6、2024年高二英语下册期末试题
7、2023-2024学年第一学期高二年级期末考试英语试题
8、2024高二期末英语答案
9、2023-2024高二期末英语
10、2023-2024高二英语期末试卷及答案

some fats was essential to growth.That fat-soluble()substance became known asVitamin“A”for "accessory.”McCollum and others also conducted further experiments with rice-bran-derivednutrient,naming it Vitamin "B"after beriberi,which can cause heart failure and a loss ofsensation in the legs and feet.Eventually,it turned out that the substance known as VitaminB was a complex of eight water-soluble vitamins,which were each given individual namesand numbered in order of discovery.The custom of naming vitamins alphabetically in order of discovery continued.Today,four fat-soluble vitamins(A,D,E,and K)and nine water-soluble vitamins(Vitamin C andthe eight B vitamins)are considered essential to human growth and health.Only onevitamin bucked the oh-so-logical naming system:Vitamin K,discovered by Danishresearcher Carl Peter Henrik Dam in 1929.The substance should have been in line to becalled Vitamin F given its discovery date.But Dam's research revealed that the vitamin isessential for blood coagulation )-known as Koagulation in the German journal thatpublished his research-and his abbreviation for the vitamin somehow stuck.It's been decades since.the last essential vitamin-Vitamin B12-was discovered in1948.It now appears unlikely that scientists will ever discover a new essential vitamin.Buteven if there's no Vitamin F or G in our future,that doesn't mean nutritional discovery hasstopped completely.If the golden age of vitamin discovery was an appetizer (ofsorts,scientists are devoted to the main course-a rapidly evolving understanding of theways food shapes our lives,one microscopic substance at a time.32.What can we learn from paragraph 2 and paragraph 3?A.Vitamin A is a water-soluble substance.B.Vitamin B was named after a kind of disease.C.The eight B vitamins got names from their functions.D.The subjects of McCullum's experiments are humans.33.What does the underlined word "bucked"mean in paragraph 4?A.Created.B.Destroyed.C.Broke.D.Followed.34.What is the author's attitude toward nutrition research?A.Indifferent.B.Unclear.C.Doubtful.D.Confident.35.Which of the following is the best title of the text?A.How Do Vitamins Influence Our Health?B.Who Discovered Various Vitamins for Us?C.Why Is There a Vitamin K but No Vitamin F?D.How Many Vitamins Are Still Left to Be Discovered?高三英语试题卷第7页（共12页）