You are creating a locally managed tablespace to meet the following requirements： All the extents should be of the same size. The data should be spread across two data files. A bitmap should be used to record the free space within the allocated extents. Which three options would you choose？（） ["set PCTFREE and PCTUSED to 50","specify extent allocation as Uniform","specify extent allocation as Automatic","create the tablespace as bigfile tablespace","create the tablespace as smallfile tablespace","set segment space management to Automatic","use the RESIZE clause while creating the tablespace"]
基本养老保险基金出现支付不足时，政府给予补贴。
开孔机液压站的动力装置通过（）调节泵的输出流量。 ["移动定子的位置","改变轴承承受力","减小叶片后倾","减小泵的排油压力"]
Examine the description of the EMPLOYEES table: Which statement shows the department ID, minimum salary, and maximum salary paid in that department, only of the minimum salary is less then 5000 and the maximum salary is more than 15000?（） [" SELECT dept_id, MIN(salary(, MAX(salary) FROM employees WHERE MIN(salary) < 5000 AND MAX(salary) > 15000;"," SELECT dept_id, MIN(salary), MAX(salary) FROM employees WHERE MIN(salary) < 5000 AND MAX(salary) > 15000 GROUP BY dept_id;"," SELECT dept_id, MIN(salary), MAX(salary) FROM employees HAVING MIN(salary) < 5000 AND MAX(salary) > 15000;"," SELECT dept_id, MIN(salary), MAX(salary) FROM employees GROUP BY dept_id HAVING MIN(salary) < 5000 AND MAX(salary) < 15000;"," SELECT dept_id, MIN(salary), MAX(salary) FROM employees GROUP BY dept_id, salary HAVING MIN(salary) < 5000 AND MAX(salary) > 15000"]
按桩身完整性类别分类，桩身有轻微缺陷，不会影响桩身结构承载力的正常发挥的桩属于（）。 ["Ⅰ类桩","Ⅱ类桩","Ⅲ类桩","Ⅳ类桩"]
对象的三个要素是属性、方法和（）
