It took        building supplies to contruct these energy—house . It took brains , too .

A．other than

B．more than

C．rather than

D．less than

老年人的器官功能与青年人相比，有哪个特点是错误的（）

A.肝脏微粒体细胞色素P450酶的生成与活性随增龄而减低

B.肾脏的肾单位（肾单元）随增龄而减少

C.肾小球滤过率减少50%左右

D.肾血流量稍有增加