预应力混凝土梁施工技术要求高,下列说法正确的是()。A.钢绞线通常用电弧进行切断 B

题型:单项选择题

问题:

预应力混凝土梁施工技术要求高,下列说法正确的是()。

A.钢绞线通常用电弧进行切断

B.预应力张拉以伸长量控制为主,应力控制为辅

C.后张拉施工中应注意张拉时混凝土强度是否满足设计规定

D.悬臂施工连续刚构桥时所有预应力管道压浆可在桥梁合龙后进行

考点:公路工程监理工程师工程系列(道路与桥梁)道路与桥梁
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已知M={x|x|2x2-5x-3=0},N={x|ax-1=0},若N⊆M,则适合条件的实数a的取值集合S=______.

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在勇气号火星探测器着陆的最后阶段,着陆器降落到火星表面上,再经过多次弹跳才停下来.假设着陆器第一次落到火星表面弹起后,到达最高点时高度为h,速度方向是水平的,速度大小为V0,求它第二次落到火星表面时速度的大小,计算时不计火星大气阻力.火星可视为半径为r0的均匀球体,其质量为M(万有引力常量为G).

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数据库设计分为以下6个设计阶段:需求分析阶段、 【5】 、逻辑设计阶段、物理设计阶段、实施阶段、运行和维护阶段。

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定期考核的结果影响着公务员的任职。导致按照规定程序降低公务员一个职务层次任职的定期考核结果是()。

A.合格

B.称职

C.不合格

D.不称职

题型:单项选择题

"Culture shock" occurs as a result of total immersion in new culture. It (51) to "people who have been suddenly transplanted abroad. " Newcomers may be anxious (52) they do not speak the language, know the (53) , or understand people’s behavior in daily life. The visitor finds that "yes" may not always mean "yes", that friendliness does not (54) mean friendship or that statements that appear to be serious are really intended (55) jokes. The foreigner may be unsure as to when to shake hands or embrace, when to (56) conversations, or how to approach a stranger. The (57) . of "culture shock" helps explain feelings of bewilderment and disorientation. Language problems do not account for all the frustrations that people feel. When one is (58) of everything that was once familiar, such as understanding a transportation system, knowing how to register for university classes, (59) knowing how to make friends, difficulties in coping with the new society may (60) .

59()。

A. but

B. nor

C. or

D. and

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