单词：organohalogens
n. 有机卤素
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This is the VOA Special English Health Report. A.D.H.D. is attention deficit hyperactivity disorder. Government estimates say three to seven percent of school-age children in the United States have it. Adults can also have it. People with A.D.H.D. ha
发表于:2018-12-16 / 阅读(50) / 评论(0)
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Hard bargainers VS. soft bargainers Dialogue 1 A: We've got a problem...it looks like we'll need more spotlights on the exhibition booth. The client thinks it's too dark,and they want to add halogen lighting. We've already got 3 sets of track lighti
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