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问题 单项选择题

已知矩形截面简支梁计算跨度ln＝8.5m，b＝350mm，h＝600mm，承受均布荷载设计值g+q＝12.3kN/m（包括梁自重），集中荷载设计值P＝210kN（见下图）。采用C30级混凝土，若箍筋为HPB300级钢筋，则仅配置箍筋时，所需箍筋为（）。

A.4Φ8@150

B.4Φ8@200

C.4Φ8@250

D.4Φ8@300

答案

参考答案：A

解析：

采用C30级混凝土，HPB300级钢筋，则有：fc＝14.3N/mm2；ft＝1.43N/mm2；fy＝300N/mm2；fyv＝270N/mm2。c＝25mm，考虑弯矩较大，取αs＝70mm，ho＝530mm，as’＝35mm。

①总剪力设计值V＝0.5×12.3×8.5+270＝322.3kN。其中，集中力产生剪力210kN，占总剪力210/322.3＝65.2%；75%，λ＝a/h0＝2750/530＝5.19＞3，故取λ＝3。

②根据《混凝土结构设计规范》（GB50010—2010）公式6.3.1-1，验算受剪截面条件：V＝322.3kN＜0.25，ΒCfCbh0＝0.25×14.3×350×530＝663.16kN，满足要求。

③根据公式6.3.13，验算构造配箍条件：V＝322.3kN；

填空题

Good afternoon, everybody. I’m pleased to be here with you, graduates of 2007. I’m a (1) , and students often approach me with (2) . You see, we are living in a society of great changes. With the presence of (3) , the process of getting a job in today’s world has changed for (4) .
Well, how can you use new technologies to help you First, let’s look at how you (5) . The traditional method of hunting for a job in the past required first, doing research on jobs that were (6) , typically by looking in newspapers, periodicals and magazines, as well as TV ads, and (7) . Then you decided where and for what post you were going to apply, put your resume (8) in a stamped envelope, and waited anxiously for someone to (9) .
Well, today, maybe the job search and (10) are very much the same, but the tools used are much more advanced, and they (11) . In fact, technology has not so much changed the process as enhanced it. The benefit, both for (12) , is that this makes the search more open to people of (13) from all over the world. But as more people are involved, it becomes (14) for the applicant than it ever was before.
The (15) for the working world today is learning these new and (16) and combining them with the older methods people have been using for years. For example, (17) , you can research employment not just in your city, but also in your state, your country, and (18) . You can copy information from a web page and paste it into a Microsoft Word document that’s easy to (19) . In many ways, it’s easier now: Just type your job application, click, and (20) ; it gets there in an instant.
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单项选择题

患者，男，汽油烧伤前臂，表皮剥脱，散在水疱，疱皮下创面微湿，红白相间，痛觉迟钝。烧伤深度为

A．Ⅰ度
B．浅Ⅱ度
C．深Ⅱ度
D．Ⅲ度
E．Ⅳ度
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