选择题:The Eiffel Tower, symbol of innovative technique a

题目内容:
The Eiffel Tower, symbol of innovative technique at the end of the 19th century, has ____ its universal image.( )(本题2.0分)
A、 maintained
B、 preserved
C、 stored
D、 continued
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计算钢筋砼受弯构件正截面承载力时,验算ξ≤ξb的目的是( )。(本题1.0分) A、 防止构件发生斜

计算钢筋砼受弯构件正截面承载力时,验算ξ≤ξb的目的是( )。(本题1.0分) A、 防止构件发生斜压破坏; B、 防止构件发生超筋破坏; C、 防止构件截面尺

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