单词：frequentativeness
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Unit three Comparison [00:05.04]Number 1 Listen to each item of information.Then listne to the statement that follows. [00:13.27]Circle TRUE or FALSE. [00:17.16]1)John is 15 years old and Bill is 30 years old.So Bill is twice as old as John. [00:25.5
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08 Using Frequent Flyer Miles GLOSSARY long weekend a period of three days (Friday-Sunday, or Saturday-Monday)where one has one extra day off from work, getting three free days in a row,usually because one uses a vacation day or because there is a ho
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Helper Serum Boosts Effectiveness of Flu Vaccine Vaccines against swine and avian flu can be made more effective by the addition of a helper serum known as an adjuvant. The finding from a new study could let vaccine makers stretch supplies and possib
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President Obama used a visit to the U.S. West coast this week to highlight the importance of improving education standards to ensure future U.S. competitiveness. He met with leaders of American technology companies, and visited high-tech facilities a
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One of the biggest challenges in fighting tuberculosis comes from new drug-resistant(抗药性的) strains of the disease. And one of the main reason those strains have developed is that TB patients often don't take their standard, 14-pill, course of
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Anne: Where were you this past weekend? I tried calling you on Friday to see if you wanted to go to the movies with me. Jurgen: I was in Chicago for a long weekend . Anne: Chicago? I didnt know you were planning a trip. I thought you were pretty stra
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