在相同运行情况下,空气制动距离要稍大于电气制动距离。
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列车的启动、制动轨道的高低及三角坑都会产生10米的危害。
A. 正确
B. 错误
()采用电话闭塞法时,对于同一列车有哪些行车手续需要同一个人来办理。
A. 填写路票
B. 交路票
C. 给发车信号
D. 接路票
170前移式叉车主要靠电池驱动,行走速度较慢且轮子半径较小,对地面要求较高。
A. 正确
B. 错误
You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions, monitoring the database server, and design deployment. In the company, you major job is the deployment, maintenance and support of Microsoft SQL Server 2005.You work as a database administrator for your company. Your job is to manage a SQL Server 2005 database, and there are several indexes in the SQL Server 2005. A stored procedure should be written, and the procedure should be utilized to check the indexes for fragmentation. From the following four Transact-SQL statements, which one should be utilized achieve the goal?()
A. To achieve the goal, DBCC DBREINDEX should be utilized.
B. To achieve the goal, SELECT * FROM sys.indexes should be utilized.
C. To achieve the goal, SELECT * FROM sys.dm_db_index_physical_stats should be utilized.
D. To achieve the goal, DBCC INDEXDEFRAG should be utilized.