Answers

2014-06-22T10:31:34+08:00
Many different units of lengthwidthheightdepth, and distance have been used around the world. The main units in modern use are U.S. customary units in the United Statesand the Metric system elsewhere. British Imperial units are still used for some purposes in the United Kingdom and some other countries. The metric system is sub-divided into SIand non-SI units.

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