单词：general conference of weights and measures (cgpm)
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Section 12 Different Values 1Weights and measures are different in different countries. 2We call the different systems decimal and imperial. 3Most countries use the decimal system. 4That’s a system
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By Lisa Schlein Geneva 20 August 2007 Experts attending an international conference are calling for quick action to reduce the threat posed by biological weapons. Participants attending the week-long meeting at the United Nations in Geneva say the so
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