题目内容
某建于非地震区的20层框架—剪力墙结构，房屋高度 H＝70m，如下图所示。屋面层重力荷载设计值为 0.8×104kN，其他楼层的每层重力荷载设计值均为1.2× 104kN。倒三角形分布荷载最大标准值q=85kN/m；在该荷载作用下，结构顶点质心的弹性水平位移为u。
在水平力作用下，计算该高层建筑结构内力、位移时，试问，其顶点质心的弹性水平位移“的最大值为下列()项数值时，才可以不考虑重力二阶效应的不利影响。
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F1、F2、c和b值同上题。当柱支座宽度的影响略去不计时，其基础梁支座处最大弯矩设计值，最接近()项数值。
假定框架梁端截面(在B轴柱边处)上部和下部配筋分别为6Φ25和4Φ55，as=a's=40mm，试问，当考虑梁下部受压钢筋的作用时，该梁端截面的最大抗震受弯承载力设计值M(kN·m)，与下列()项数值最为接近。
He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them. But if he is equally unable to refute the reasons on the opposite side; if he does not so much as know what they are, he has no ground for preferring either opinion. The rational position for him would be suspension of judgment and unless he contents himself with that, he is either led by authority, or adopts, like the generality of the world, the side to which he feels the most inclination. Nor is it enough that he should hear the arguments of adversaries from his own teachers, presented as they state them, and accompanied by what they offer as refutations. That is not the way to do justice to the arguments, or bring them into real contact with his own mind. He must be able to hear them from persons who actually believe them; who defend them in earnest, and do their very utmost for them. He must know them in their most plausible and persuasive form. he must feel the whole force of the difficulty which the true view of the subject has to encounter and dispose of else he will never really possess himself of the portion of truth which meets and removes that difficulty. Ninety-nine in a hundred of what are called educated men are in this condition, even of those who can argue fluently for their opinions. Their conclusion may be true, but it might be false for anything they know: they have never thrown themselves into the mental position of those who think differently from and considered what such persons may have to say, and consequently they do not, in any proper sense of the word, know the doctrines which they themselves profess. They do not know those parts of it which explain and justify the remainder: the considerations which show that a fact which seemingly conflicts with another is reconcilable with it, or that, of two apparently strong reasons, one and not the other ought to be preferred.
According to the author, in a great period such as the Renaissance we may expect to find ______.
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