搜题请搜索小程序“爱下问搜题”
问题 单项选择题

题33～36：

已知一预制空心板梁的截面尺寸如题图所示，计算跨径l=12.6m，承受计算剪力：支点Qoi=236.7kN，跨中Q1/2j=43.7kN，其间按直线变化，采用30号混凝土、ll级钢筋7φ20作为受拉钢筋(Ag=22cm2)，ag=3.6cm。仅用Ⅱ级钢筋φ10配置箍筋。

最大剪应力发生处的腹板宽度为（）cm。

A．15

B．99

C．23

D．16

答案

参考答案：C

解析：

最大剪应力发生在腹板宽度b最窄处，故取h=8+7+8=23cm

填空题

Most "unassertive" people are not confident and take no for an answer much too easily. There is a growing awareness in our society that this tendency (1) the rights of large numbers of people. For example, in recent years there has been an upsurge in (2) and pressure groups. This is a (3) as there will always be a need for such organizations to (4) individuals and minorities in a competitive society. The danger is that we (5) for our rights and lose the art of asserting ourselves. It is better for (6) with other people if you can learn (7) for yourself.
Now, we have to learn to ignore some of the (8) that may be ringing in our unconscious minds, such as: "If you ask once more, I’ll flatten you", and " (9) ".
The main technique that we use in (10) to practice the art of persistence is called Broken Record. (11) we hear one sentence over and over again until we reach screaming pitch and (12) .
Broken Record is the skill of being able to repeat over and over again, (13) , what it is you want or need, until the other person gives in or (14) .
Now, this technique is extremely useful for dealing with situations where your rights are clearly (15) , or coping with situations where you are likely to be diverted by clever, (16) .
The beauty of using Broken Record is that you (17) because you know exactly what you are going to say, however (18) the other person tries to be.
As with most assertive techniques, it must be used appropriately. It is (19) and is not designed to foster deep, interesting conversations and friendships with people! It is primarily of use in situations where (20) .
查看答案
单项选择题

下列哪项是参数调整中需要关注的对象______。

A．内存分配

B．资源竞争

C．磁盘I/O

D．以上全部
查看答案