题目内容

为防止钻孔施工过程中发生煤和瓦斯突出事故，在突出煤层封孔时，套管长度应大于（），套管口应装密封安全装置。

A. 1m
B. 1.5m
C. 2m
D. 2.5m

查看答案

搜索结果不匹配？点我反馈

更多问题

Your database initialization parameter file has the following entry： SEC_MAX_FAILED_LOGIN_ATTEMPTS=3 Which statement is true regarding this setting？（）

A. It drops the connection after the specified number of login attempts fail for any user.
B. It is enforced only if the password profile is enabled for the user.
C. It locks the user account after the specified number of attempts.
D. It drops the connection after the specified number of login attempts fail only for users who have the SYSDBA privilege.

查看答案