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问题 单项选择题

用吊索起吊重为W的构件，两斜索与构件所成的角度为α，吊点对称，则斜索内力最大时的角度α为（）。

A.30° 

B.45° 

C.60° 

D.75° 

答案

参考答案：A

解析：这是一道建筑结构技术要求的题，主要考核平面力系的平衡条件及其应用的知识点。有一定专业性，对于专业基础知识扎实的考生，此题不难。 根据平面汇交力系平衡条件，可知：P为定值W; 假定两斜索的内力均为F，则2?F?sinα=P 即，只有当sinα最小时，斜索的内力才最大。 观察四个选项，显然本题的正确项应为“A.30°”。 考点 建筑结构技术要求

单项选择题

关于伪造票据的效力，表述错误的是（）。

A.被伪造签章的人不负任何票据责任

B.伪造人不负票据责任，但不排除承担其他法律责任

C.付款人如对伪造票据付款，须自行承担责任

D.不影响票据上其他真实签章人的票据责任
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填空题

Blair Admits Never Having Sent Flowers to His Wife


British Prime Minister Tony Blair admitted on a television programme that he has never sent flowers to his wife Cherie and that he had a youthful crush on Hollywood beauty Grace Kelly.
Blair, who allowed Channel 4 interviewer June Sarpong to shadow him for two days last month, made other personal (1) when asked questions he rarely hears on the usual television political (2) .
During the interviews for a program targeting 18-30 year (3) , the prime minister admitted he sometimes has to "wing it" when (4) public appearances and that he yearns to go out for a drink (5) being recognised.
However, the most dramatic revelation was his reply to Sarpong’s (6) on whether he still sends his wife flowers, prompting his interviewer to (7) in disbelief. "I’ve never sent her flowers. If I sent her flowers, she would (8) worried," Blair said.
But he added: "I am romantic. There are other ways of (9) romantic."
Blair needed a few moments to recall which posters he had (10) his bedroom wall as a youngster, then revealed: "I’ll tell you... actually, (11) I was younger, I loved Grace Kelly."
Born in 1929, Kelly (12) in films like ’Dial M For Murder’, ’Rear Window’ and ’High Society’ in the mid-1950s, but (13) acting to marry Prince Rainier of Monaco in 1956, when Blair was (14) two years old.
Blair admitted he initially found it "odd" to be (15) minister and to be rushed in motorcades from appointment to (16) , and worried that his lifesty left him "a bit isolated" from (17) people.
He admitted that he was constantly on the phone between public (18) , and rarely had time to prepare for his next (19) , telling Sarpong: "I wing it all the time."
And he revealed he has to check himself before he replies to (20) questions from the public. "The worst thing is when someone is giving you a real earful and you think ’I’m going to say something I will regret’," he said.
Asked what he would do if he could be invisible for a day, Blair yearned for a more ordinary life, saying he would "just walk down the street and go to the pub... just be absolutely normal".
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