抗震框架柱中间楼层的非连接区为≥Max(Hn/6,500,hc)。 ( )
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KL8(5A)表示第8号框架梁,5跨,两端有悬挑 。
A. 对
B. 错
两根梁相交,主梁是次梁的支座,附加箍筋就设置在次梁上 。
A. 对
B. 错
[音频]Three Gorges Dam (Yangtze River, China)---Dr. Paul BenjaminSize: ___1___ miles long and ___2___ feet tallReservoir ___3___ miles longWorkers: more than ___4___Benefits / Reasons for Building the Dam:Provides a ___5___ of energyControl floods on YangtzeRiver deeper, so ___6___ can travel farther up the riverRisks:Will put a lot of ___7___ underwaterMany ___8___ andvillages will probably disappearMany very ___9___ historical andcultural sites will be underwaterSignificant impact onthe ___10___
下列说法正确的是( )
A. 非常小的数是无穷小
B. 零可以看作是无穷小
C. 无限变小的变量称为无穷小
D. 无限个无穷小的和还是无穷小