Examine the data of the EMPLOYEES table. EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID) EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 103 Chris 20 120 IT_ADMIN 4200 104 John 30 108 HR_CLERK 2500 105 Diana 30 108 HR_MGR 5000 106 Bryan 40 110 AD_ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EX_DIR 8000 120 Ravi 20 110 SA_DIR 6500 Which statement lists the ID, name, and salary of the employee, and the ID and name of the employee's manager, for all the employees who have a manager and earn more than 4000?（） SELECT employee_id "Emp_id", emp_name "Employee", salary, employee_id "Mgr_id", emp_name "Manager" FROM employees WHERE salary > 4000;。 SELECT e.employee_id "Emp_id", e.emp_name "Employee",。 salary,。 employee_id "Mgr_id", m.emp_name "Manager" FROM employees e, employees m WHERE e.mgr_id = m.mgr_id AND e.salary > 4000。
施工投入应和工程投入与产出或称效益，进行综合评价，项目应以效益又应当和企业在该地区的远景效益综合在一起评价。
标准公差等级代号数字越大，则尺寸精度越高。
对于66KV线路过电流保护，在保护两点接地方面，那种接线方式有明显的优点（）。 两相电流差接线方式。 两相不完全星形接线方式。 三角星形接线方式。
You are using Oracle Database 10g. You performed an incomplete recovery of your database and opened the database with the RESETLOGS option. What is the effect of opening the database with the RESETLOGS option？ （） This operation resets the SCN for the database.。 This operation creates a new incarnation of the database.。 This operation moves all the redo log files to a different location.。 This operation deletes the old redo log files and creates new redo log files.。 This operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.。
当碱性电瓶电解液缺少可以（）
