在使用断管设备时要保证（） 切割车刀的锋利。 设备运行的平稳。 切割铣刀的锋利。 链条的节数随被且切管变化。
（）浆体在硬化初期，体积发生微小膨胀。 生石灰。 建筑石膏。 水泥。 三合土。
Observe the information in the columns： 1： The SGA a. Text and parsed forms of all SQL statements 2： The cursor state b. Run-time memory values for the SQL statement， such as rows retrieved 3： User-session data c. Security and resource usage information 4：The stack space d. Local variables for the process Which option has the correct match between the memory areas and their contents（） 1-c，2-b，3-d，4-a。 1-c，2-b，3-c，4-a。 1-a，2-b，3-c，4-d。 1-a，2-b，3-d，4-c。
You execute the following command to enable a session in resumable mode： SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60； What is the impact of a timeout on the statements being suspended？（） The statements remain suspended for at least 60 seconds.。 The statements are suspended for 60 seconds and then they are executed.。 The suspended statements error out if the problem is not rectified within 60 seconds.。 The statements are automatically suspended 60 seconds after an error is received， and then attempt to execute normally again.。
论述往复活塞式压缩机气缸的安装程序及方法。
Your application requires that you programmatically manipulate a nonquery record group. Which three built-ins can you use?（）
