A:表明美国急需建立中央集权制政府
B:确立了国家权力结构中州权至上的原则
C:有助于均衡各州利益确保行政效率
D:主要为避免会议受外界干扰
—The children in rural areas have few books to read. Let's ______ some books to them.—Great, it is a good idea.