单词：circular chromatograph
单词：circular chromatograph 相关文章
Unit 4 Free-time Activities Ice Fishing(E) A boy wanted to go ice fishing,He'd read many books on the subjectand finally,after getting all the necessary tools togetherhe made for the nearest frozen lakeAfter positioning his stool,he used a drill to m
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city 城市 cigar 雪茄 cigarette 香烟 circle 圆圈 circular 圆形的
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This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a Minute? What's the best way to find out if an unknown mixture contains a specific substance, like an environmental contaminant? You could use an expensive, bulky gas chromatogr
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This is the VOA Special English Agriculture Report. A round barn in Illinois American farmers traditionally keep their animals and equipment in barns that are rectangular, longer than they are wide. But as many as one thousand barns in the Midwest a
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BEIJING, Dec. 27 (Xinhua) -- The disciplinary watchdog of the Communist Party of China (CPC), as well as the government's supervisory authority, have called for efforts to halt extravagance during the upcoming holiday season. The use of public funds
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BEIJING, March 14 (Xinhua) -- China will change three members of the central bank's monetary policy committee, according to a circular released Wednesday by the State Council, or the Cabinet. The circular said the State Council has approved the appoi
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