馈线到天线端的小区连接和机柜端的小区连接需（） ["正确","不需要对应"]
Examine the data from the EMP table: EMP_ID DEPT_ID COMMISSION 1 10 500 2 20 1000 3 10 4 10 600 5 30 800 6 30 200 7 10 8 20 300 The COMMISSION column shows the monthly commission earned by the employee. Which three tasks would require subqueries or joins in order to perform in a single step? （） [" Deleting the records of employees who do not earn commission."," Increasing the commission of employee 3 by the average commission earned in department 20."," Finding the number of employees who do NOT earn commission and are working for department 20."," Inserting into the table a new employee 10 who works for department 20 and earns a commission that is equal to the commission earned by employee 3."," Creating a table called COMMISSION that has the same structure and data as the columns EMP_ID and COMMISSIONS of the EMP table."," Decreasing the commission by 150 for the employees who are working in department 30 and earning a commission of more then 800."]
开孔刀的刀齿一般由（）个构成一组。 ["1","3","4","5"]
You configured the large pool for Oracle backup and restore operations. As a result， which component would require less memory？（） [" streams pool"," shared pool"," log buffer"," keep buffer cache"," recycle buffer cache"]
Given： Which statement is true？（） ["Compilation fails.","An exception is thrown at runtime.","Synchronizing the run（） method would make the class thread-safe.","The data in variable "x" are protected from concurrent access problems.","Declaring the doThings（） method as static would make the class thread-safe."]
静不平衡所产生的离心力，使旋转件产生（）方向的振动。
