The cross section of wool fiber may be nearly ,but most wool fiber tend to be slightly or oval shape.
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【简答题】阅读理解。 BEIJIN-No Car Day was first started by 34 cities in France on September 22,1998. It was started to protect the environment, By now, more than 1,000 cities around the world have had a No Car Day....
【简答题】BEIJIN—No Car Day was first started by 34 cities in France on September 22,1998.It was started to protect the environment, By now, more than 1,000 cities around the world have had a No Car Day. The fi...