采用导线测量方法建立CPII或是CPIII时，如使用DJ1测量仪，其2C较差应不大于（）
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控显双机内通过（），用于和CTC系统进行信息交互。
痛风急性发作时服用哪种药物可以快速缓解症状：（）
A. 丙磺舒
B. 秋水仙碱
C. 阿司匹林
You are designing the DNS topology to meet the business and technical requirements. Which DNS structure should you use？（）
A. one primary zone
B. two primary zones
C. one Active Directory-integrated zone that has the replication scope set to all DNS servers in the forest.
D. two Active Directory-integrated zones that have the replication scopes set to all DNS servers in the forest.
E. one Active Directory-integrated zone that has the replication scope set to all domain controllers in the domain.
F. two Active Directory-integrated zones that have the replication scopes set to all domain controllers in the domain.
线路爬行的原因（）。
A. 钢轨在动荷载下的挠曲。
B. 列车运行的纵向力。
C. 钢轨的温度变化。
D. 列车的制动。
E. 车轮在钢轨接头处撞击钢轨。
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