单词：conditioned immunity
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Passage 40 How High Can You Jump? Flea trainers have observed a strange habit of fleas while training them. Fleas are trained by putting them in a cardboard box with a top on it. The fleas will jump up and hit the top of the cardboard box over and o
英语专业四级听写
VI. Further Listening and Speaking Listening Task 1: The Residence Hall The University Residence Hall houses 339 students. It is conveniently located on campus, and provides comfortable, fully air-conditioned room for male and female students. As an
新视野大学英语：视听说教程 1
5 房屋设施 3句英文任你选 The room is large and bright. The two windows open on to a small garden. 房间又宽敞、又明亮。打开落地窗便是小花园。 It has all the furniture necessary for daily use. 日常用的家具都有。
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How High Can You Jump? Flea1) trainers have observed a strange habit of fleas while training them.Fleas are trained by putting them in a cardboard box with a top on it.The fleas will jump up and hit the top of the cardboard box over and over and over
英语沙龙
How High Can You Jump? Fleas trainers have observed a strange habit of fleas while training them. Fleas are trained by putting them in a cardboard box with a top on it. The fleas will jump up and hit the top of the cardboard box over and over and ove
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How High Can You Jump? Flea trainers have observed a predictable and strange habit of fleas while training them. Fleas are trained by putting them in a cardboard box with a top on it. The fleas will jump up and hit the top of the cardboard box over a
英语美文