The towers of a suspension bridge serve as a rigid {{U}}framework{{/U}} to which the cables are attached.

题库:综合类 类型:最佳选择题 时间:2017-07-03 03:14:04 免费下载:《单选题》Word试卷

The towers of a suspension bridge serve as a rigid {{U}}framework{{/U}} to which the cables are attached.
A.boundary
B.skeleton
C.enclosure
D.material

本题关键词:僵a,ECF-A,EP21-A,EP6-A,EP18-A,EP7-A,Lp(a),Lp（a）,A-aDO2,抗A;