2014
高考英语阅读理解精品练习（14）及答案（解析） c8 [2013•大纲全国卷] e the oldest and most common source(来源)of renewable energy known to man, biomass is one of the most important forms of energy production in the united states and elsewhere.since such a wide variety of biomass materials is everywhere—from trees and grasses to agricultural and city－life wastes—biomass promises to play a continuing role in prov
