You work as a database administrator for Certkiller .com. You want to administer your database servers，which are running on different host machines，using the Web-enabled grid control interface. You have configured the agent on the host machines. You have started the Oracle Database 10g Grid Control utility on your machine. Which two additional components would you configure to achieve this objective？（） ["Application Server Control","Oracle Management Service","Oracle Enterprise Manager Repository","Oracle Enterprise Manager Database Control"]
在气瓶上使用警示标签可以提供（）信息。 ["瓶装气体名称及化学分子式；","混合气体主要成份的名称和化学分子式；","瓶装气体的充装方法；","瓶装气体应采取预防措施的附加说明"]
老舍的最后一部长篇小说是（） ["《骆驼祥子》","《四世同堂》","《龙须沟》","《正红旗下》"]
两台变压器并列运行时，如果其他条件相同，只有短路电压不同，则（）。 ["短路电压大的变压器带负荷多","短路电压小的变压器带负荷多","两台负荷一样多"]
A PL/SQL procedure queries only those columns of a redefined table that were unchanged by the online table redefinition. What happens to the PL/SQL procedure after the online table redefinition？（） [" It remains valid."," It becomes invalid for all options of online table redefinition but automatically gets revalidated the next time it is used."," It becomes invalid for all options of online table redefinition and is automatically recompiled during online redefinition of the table."," It becomes invalid only if the storage parameters have been modified and it automatically gets revalidated the next time it is used."]
在制定行车计划时，若要求在一个小时内发出11个车次，车辆的周转时间均为70min，则最少需要投入多少车辆？
