D. 2017 car preview of new vehicles

　　答案

　　D

　　[主旨大意题。根据文章第一段，及其下文的价格可知，本文主要是涉及2017年将要上市的几款新车型。故D项为最佳标题。]

　　B

　　BOLSE，Idaho—Among traditional houses on Boise Avenue，MarkLung，a former ecology professor，is working hard at bales(大捆)of straw(稻草)and mixing mud.

　　He is building a new home using local，recycled agricultural waste to build walls.The mud，sand，straw and water will be used both inside and outside of the house instead of bricks and paint.

　　“ Similar in appearance to Southwestern adobes，straw­bale structures are earth­friendly and energy­efficient，” Lung said.

　　Unlike the wall in a typical home，which is about 6 inches thick，a straw­bale wall is 18 to 23 inches thick，providing greater protection for the house against winter cold，summer heat and sound.Fire and pests are not a problem，either.

　　“Straw makes sense.It might be the building material of the future，”

　　Lung said.“It is a cheap and easily renewable(可再生的)building material.”

　　Lung lived in a straw­bale house in Gunnison，Colo.，before moving to Boise.While there，he carefully set down the temperatures over a period of time.The outside temperature changed from 20 to 80 degrees.Inside，the temperature stayed between 68 and 72—there is no need to use heating or cooling equipment.

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