问题 单项选择题

某多层现浇钢筋混凝土民用建筑框架结构,无库房区,属于一般结构,抗震等级为二级。作用在结构上的活载仅为按等效均布荷载计算的楼面活载;水平地震作用和竖向地震作用的相应增大系数为1.0,已知其底层边柱的底端受各种作用产生的内力标准值(单位:kN·m,kN)如下:静载:M=32.5V=18.7活载:M=21.5V=14.3左风:M=28.6V=-16.4右风:M=-26.8V=15.8左地震:M=-53.7V=-27.0右地震:M=47.6V=32.0垂直地震:M=16.7V=10.8试问,当对该底层边柱的底端进行截面配筋设计时,按强柱弱梁、强剪弱弯调整后,其基本组合的M(kN·m)的最大设计值,应与下列何项数据最为接近()?

A.M=183.20

B.M=168.16

C.M=152.66

D.M-122.13

答案

参考答案:A

选择题
阅读理解

Lots people stress out(紧张) about talking in front of the class or getting laughed at if they make a mistake in front of an audience._71_ The “stress hormones” that your body produces at times like these can actually help you focus.

But when worry and stress about performing get to be too much, these hormones give people that “red alert(紧急状态)”---the one that causes you to feel cold or sweaty, or get butterflies in your stomach._72__

Be prepared. __73_ Rehearse(排练) as much as you can and practice in front of others at every opportunity. Most of all, think positively. Tell yourself “I’ll be OK” or “I can do this” even if you are not 100% sure of it.

Look after yourself. Before big performances, it’s easy to let taking care of yourself slip as you spend too much time on rehearsals and practice. __74__ Exercise can also can also help you feel good, and along with sleep and nutrition, is an excellent way of keeping those stress hormones from getting out of control.

Find out what the experts do. You can find books, DVD, and online information about how to give your best when you perform, depending on what type of performance you’re preparing for._75_ Or ask the cast of your school play or your drama or music teacher how they beat stage fright. And if your parents or grandparents ever performed, they may have their own secrets to share.

A Confidence helps beat stress hormones.

B The following tips can help you avoid that feeling.

C You’re less likely to freeze up if you’re well prepared.

D You can do this whether you’re performing alone or as part of a group.

E Check out stories about Olympic gymnasts or your favorite star to get their tips.

F Feeling nervous before a performance is part of body’s way of helping you do your best.

G You’ll look and feel your best if you get enough sleep and eat healthy meals before your performance.