新一代天气雷达站雷击电磁脉冲的防护，应适当加密雷达机房和控制室的外墙钢筋密度。其钢筋密度网孔一般不大于（）。墙上敷设的电缆、光缆与避雷引下线最小平行净距离为（）。
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运输业的资本结构特殊，只由垫付在劳动资料和劳动力上上下下的资本构成。因此，运输资本的循环公式与一般工业资本的循环公式（），且固定资本比重较（），游动资本比重较（）。
应如何进行科研创新（）
A. 要解放思想，大胆怀疑
B. 要了解学术动态，善于批判继承
C. 善于总结实践经验，把经验上升到理论
D. 要提高理论修养，增强分辨能力和表达能力
E. 敢于坚持真理，不怕打击迫害
Which two statements regarding the IS-IS DIS election process are true？ （）
A priority of 0 will prevent a router from becoming a DI
B. If the DIS becomes unavailable the backup DIS is promoted to DI
C. Adding a router with a higher priority than the current DIS will result in the new router becoming DI
D. Separate L1 and L2 election processes are held on a brodcast network.
E. L1 routers on a broadcast network only establish adjacencies with the DI
F. If there is a tie based on priority，the router whose attached interface has the lowest MAC address becomes the DI
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