按俩端简支，但板式楼梯的梯段的刚度较小，两端与平台梁及平台板相连，支座约束作用较为显著，因而梯段板的跨中弯矩值可以小一点，可近似地取 M=ql^2/10
Superconductor Ceramic (陶瓷) An underground revolution begins this winter. With the flip (轻击) of a switch, 30,000 homes in one part of Detroit will soon become the first in the country to receive elec...