题目

   A recent Auburn University study provides some real numbers to back a theory we’ve all known was true for some time―planting a shade tree near your home reduces energy bills significantly in the spring and summer months. The study, conducted in Auburn, Alabama, included 160 homes with different levels of shade. Each home’s energy usage was monitored and compared to other houses with similar energy― using patterns, size, type of cooling system, etc. Here are some highlights from the study:Houses with trees on the west side of their home had a “much lower power bill”.Older homes淀粉、蛋白质和脂肪经过消化后的最终产物是（ ）A．水、无机盐、维生素 B．麦芽糖、蛋白块、脂肪微粒C．无机盐、维生素、食物残渣 D．葡萄糖、氨基酸、甘油和脂肪酸