钢塔构件连接法兰盘的接触面不得涂漆，如有污染应清除干净，以确保良好的接地。
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You work as a database administrator for Certkiller .com. You added atablespaceto your database. Because of the changes to the physical structure of your database， you performed a backup of the control file to trace. After this， you lost only the control files and the instance aborted due to a hardware failure. How would you proceed to recover the database？（）
A. Start the instance and open the database, instance recovery automatically recovers control files
B. Create a file based on the contents of the trace file and save it to the control file locations and start the database
C. Re-create the database (The recovery of the control file is not possible because you have lost all the control files.)
D. Start the instance, in the NOMOUNTstate,re-create the control file using the CREATE CONTROLFILE command stored in the trace file.
E. Start the instance and MOUNT the database, then re-create the control file using the CREATE CONTROLFILE command stored in the trace file.
幼儿园教育的基本原则是（）
A. 儿童利益优先的原则
B. 尊重儿童的原则
C. 游戏为基本活动的原则
D. 保障幼儿基本权利的原则
如果实测冲程与实际不符，可以通过调整角位移传感器游梁臂长修正。（）
A. 正确
B. 错误
频率复用距离指得是在满足通信质量要求下，允许使用相同频率的小区之间的（）。
A. 最小
B. 最大
C. 平均
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