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【单选题】
户外广告牌多为钢结构，常因钢性架构的老化与脆裂成为意外杀手。为提高钢结构广告牌的安全性，以下优化措施不恰当的是 （）
A.
定期对其安全性进行检查，及时发现并更换受损、老化的构件
B.
在钢材表面涂刷油漆或镀金属保护层
C.
对关键的受力部位禁止打孔
D.
减少钢结构材料受力的截面积
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【单选题】Media Selection for Advertisements After determining the target audience for a product or service, advertising agencies must select the appropriate media for the advertisement. We discuss here the ...
A.
such ads have been made much more attractive
B.
billboards can be replaced within two hours
C.
consumers travel more now than ever before
D.
the pace of urban life is much faster nowadays
相关题目：
【单选题】Media Selection for Advertisements After determining the target audience for a product or service, advertising agencies must select the appropriate media for the advertisement. We discuss here the ...
A.
such ads have been made much more attractive
B.
billboards can be replaced within two hours
C.
consumers travel more now than ever before
D.
the pace of urban life is much faster nowadays
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