单选题 10.  The towers of a suspension bridge serve as a rigid framework to which the cables are attached.
【正确答案】 B
【答案解析】 句意:吊桥上的塔作为坚硬的构架,使得电缆可以系在上面。framework框架,基本结构。skeleton(楼房或计划的)构架;框架。二者意思相近。boundary边界;分界线。enclosure围墙;围场。material材料。