题目

阅读理解 This new packaging material looks likeconventional plastic, but it's actually made from fish waste and algae(海藻)--and unlike plastic, if itescapes into the ocean, a fish could likely eat it safely. The material, calledMarinaTex, is the winner of this year's James Dyson Award. It began with my desire to work withwaste, says Lucy Hughes, a recent graduate from University of Sussex, whoonce visited a fish processing factory to see the massive quantity of wastegenerated by the industry and find new ways to use it. She focused on fishskins and scales (鳞片). When I had itin my ha（2009北京卷文）设D是正及其内部的点构成的集合，点是的中心，若集合，则集合S表示的平面区域是  (    ) A． 三角形区域                             B．四边形区域                C． 五边形区域                             D．六边形区域