庭荫树的选择标准
One of the users in the PROD database，Adams，complains that his update on the table，TRANS， is taking an unusually long time to complete. You find that the table gets locked by another database user before Adams starts his transactions，and you are unable to contact the user holding the table lock. As Adams is updating some crucial rows in the table， he should get the highest priority. Which method would you use to overcome this problem？（） ["execute the command， ALTER SESSION KILL ..， to kill the blocking session","execute the DBMS_SESSION.KILL_SESSION procedure to kill the blocking session","execute the command， ALTER SYSTEM KILL SESSION ..， to kill the blocking session","execute the command， ALTER SESSION UNLOCK ..， to release the lock for the blocking session","execute the command， ALTER SYSTEM UNLOCK SESSION ..， to release the lock for the blocking sessio"]
You want to make use of the object features available in the database for the form module you are developing. Which three statements about object types are true? （） ["An object type is a user-defined composite data type. ","The attributes of an object type can be those of other object types. ","A PL\/SQL table of records is an example of a nested object type. ","An object type must be declared as a type before the actual object itself can be declared."]
下列属于英国1984年《数据保护法》规定了对数据用户“不透露”条件豁免的情况是（） ["为了国家安全的理由，需要透露数据","由法人团体成员组成的团体所拥有的数据","仅为一个或一个以上的目的而拥有的数据","法律要求数据用户公布的个人数据"]
借鉴西方意识流小说心理描写，以韦弥为主人公的反思小说是（）。 ["《我是谁》","《杂色》","《啊！》","《绿化树》"]
简述角色游戏的基本结构。
