某7层框架结构，计算简图如题图所示。假定
轴线柱承受的水平荷载产生的弯矩M占该柱总弯矩设计值的75%以上；底层柱的线刚度为0.0015E，其余柱的线刚度为0.00225E；—
轴线间梁的线刚度为0.00179E，其余梁的线刚度为0.00119E。
试问，轴线第2层柱的计算长度值l0（m），与下列（）项数值最为接近。
A．9.68
B．6.77
C．5.00
D．7.02
参考答案：C
解析：
l0=1.25H=1.25×4000=5000mm
One night , a poor young artist stood at the gate of the subway station, _____ his violin . Some passers-by（行人） slowed down their paces and put some money into the hat of the young man. The next day the young artist came to the same place. Different from the day before, he took out a large piece of paper and _____ it on the ground and put some stones on it . Then he began playing. Before long , many people were attracted by the words on that paper which said, “ Last night a gentleman ______George Sang put an important thing into my hat by mistake. Please come to claim（认领）it soon.” A middle-aged man ran there _____ and rushed through the crowd to the violinist and grabbed （抓住）his shoulders and said, “ Yes, it is you. You did come here. I knew that you are an( a ) _____ man and would certainly come here.” The story turned out to be this: George Sang bought a lottery ticket a few days ago. The award opened yesterday and he won a prize of 5000,000 dollars. _______ his way home, he took _____ 50 dollars and put it in the violinist’s hat. However, the lottery ticket was also thrown in . The violinist was a student at an Arts College . He had booked the ticket to flight and came back to ____ he was given the lottery ticket. Later someone asked the violinist _____ he didn’t take the lottery ticket for himself. The violinist said, “ Although I don’t have much money, I live happily. _____ if I lose honesty, I won’t feel happy forever.”
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