问题 单项选择题

桥梁工程施工发现预应力锚具的质量证明资料不够齐全时,应按规范的规定进行静载()试验。

A.初始应力

B.磨阻系数

C.滑动性能

D.锚固性能

答案

参考答案:D

解析:

本题属于城市桥梁预应力施工基本知识,具有较强的实践性。《城市桥梁工程施工与质量验收规范》CJJ2规定:对大桥、特大桥等重要工程,或对质量证明资料不齐全、不正确及质量有疑点锚具,应进行静载锚固性能试验。

在通过外观和硬度检验的同批中抽取6套锚具(夹片或连接器),组成3个预应力筋锚具组装件,由具有相应资质的专业检测机构进行静载锚固性能试验。如有一个试件不符合要求,则应另取双倍数量的锚具(夹具或连接器)重做试验,如仍有一个试件不符合要求,则该批产品视为不合格品。

对用于中小桥梁的锚具(夹片或连接器)进场验收,其静载锚固性能可由锚具生产厂提供试验报告。

由此可知,D项为正确选项。其他三项显然是干扰项。

判断题
填空题

Part of the debate about culture revolves around issues of perspective and ownership. Within a nation such (1) the United States—a nation whose cultural heritage includes elements from every corner of the world (2) are a great many perspectives coexisting and intertwining in the cultural fabriC.When we all ask (3) as individuals, "what belongs to me, to my culture " we are rewarded with a spectacular variety of (4) ; in this way, different perspectives and ownership of different cultural traditions enriches everyone. But when we ask " (5) belongs to us, to our culture " we ask a much harder question. Do the people of the (6) States, or of any culturally complex human society, necessarily share common cultural elements If so, who gets (7) decide what those elements are
This debate is a crucial one in many cultures throughout the world (8) . In the US, the debate promises to impact the way we educate our children—that is, (9) manner and shape in which culture reproduces itself—and the way we write our laws. In (10) countries, equally crucial issues are at stake.
For many people, what is at stake is the character (11) US national identity. Hirsch argues that this identity needs to become less culturally fragmented; others, like Walker, (12) that the national character gets its strength from cultural diversity, from the freedom (at home and in (13) ) to celebrate, honor, and reproduce different cultural traditions. Those who take this latter view follow the reasoning (14) Shweder, arguing that we need to accept that there are multiple valid cultural perspectives and that two (15) perspectives can both be valid even though they might contradict one another.
Recognize that the position you (16) in this debate about culture—whatever position you take—is a political one with implications (17) what we should value, what we should praise, what we should accept, what we should teach. When (18) reflect on this debate, when you contribute your own voice to the discussion, try to be (19) of the implications that follow from your position. When you listen to the voices of others, try to (20) with awareness, deciding for yourself what is at stake and how their positions relate to your own.