单选题
The towers of a suspension bridge serve as a rigid
framework
to which the cables are attached.
A、
boundary
B、
skeleton
C、
enclosure
D、
material
【正确答案】
B
【答案解析】
[解析] framework:结构、框架,和skeleton(骨架、骸骼)意思相近;boundary:分界线;enclosure:围绕、围墙;material:材料。
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