题目内容

Which one of the following statements about the TNSPING utility is correct?()

A. It helps you to determine whether or not the Oracle database is running.
B. It requires the username and password to check the connectivity of the service.
C. It does not require the username and password to check the connectivity of the service.
D. It establishes a session with the database and checks the connectivity of the service.

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根据物权法规定,所有权人对自己的不动产或者动产,依法享有以下哪些权利()。

A. 占有
B. 使用
C. 收益
D. 处分

当接触网作业车发动机启动时,应将转换开关放在接合位置,将钥匙插入扭动电锁。

A. 正确
B. 错误

颚式破碎机用于煤样的()或(),不得超范围使用。调整排料粒度时,严禁()。

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