课时分层作业6 必修第一册 Unit 6 At one with nature(Word练习)-【名师导航】2024年高考英语一轮总复习(新教材新高考)外研版

课时分层作业(六) 必修第一册　Unit 6　At one with nature Ⅰ．阅读理解(限时7分钟) (2022·广东惠州第三次调研) It is an old saw that there is nothing new under the sun．But it may still come as a surprise that human beings aren't alone in having invented vaccination (接种疫苗)．The work published by Gyan Harwood of the University of Illinois confirms that honeybees got there first．It also suggests they run the vaccination programmes like humans． One discovery in 2015 is that queen bees vaccinate their eggs by transferring into them antigens (抗原) which start the development of a protective immune response．But that observation raises the question of how the queen receives her antigen supply in the first place，for she lives only on royal jelly (蜂王浆) produced by worker bees who act as nurses to baby bees．Dr．Harwood therefore wondered if the nurses obtain the antigens while eating nectar (花蜜)． To test this idea，he cooperated with Heli Salmela．Together，they collected about 150 nurse bees and divided them among six queenless hives with baby bees to look after．Instead of nectar，they fed the nurses on sugar­water，and for three of the hives they mixed the sugar­water with a bacterium that causes a hive­killing disease． In this case，to stop such an infection happening，Dr．Harwood and Dr．Salmela heat­treated the bacteria to kill them in advance．They also labeled the dead bacteria with a fluorescent dye (荧光染料) to make them easy to track．And，the result showed that pathogens (病原体) were getting into royal jelly produced by those nurse bees． All told that nurse bees are indeed，through their royal jelly，passing antigens on to the queen，and then to the eggs．Meanwhile，after they hatch，the eggs receive antigens from the nurses as well，thus being vaccinated twice． 1．In which section of a newspaper can we find this text? A．Science．　 B．Education． C．Geography． D．Medicine． 2．What does Dr．Harwood in paragraph 2 put forward? A．An assumption． B．A suggestion． C．A theory． D．A fact． 3．Why were the nurse bees fed on sugar­wa