跳远的空中姿势主要为了（）和为落地创造有利条件，对跳远成绩影响的主要因素是（）、（起跳角度）。
Which command will migrate a filesystem from one volume group to another？（） ["cpfs","cplv","mkfscopy","migratepv"]
学前儿童语言教育评价有哪些内容？
泥浆护壁钻孔灌注桩施工工艺流程中，“第二次清孔”的下一道工序是（）。 ["下钢筋笼","下钢导管","质量验收","浇筑水下混凝土"]
Examine the structure of the EMP_DEPT_VU view: Column Name Type Remarks EMPLOYEE_ID NUMBER From the EMPLOYEES table EMP_NAME VARCHAR2(30) From the EMPLOYEES table JOB_ID VARCHAR2(20) From the EMPLOYEES table SALARY NUMBER From the EMPLOYEES table DEPARTMENT_ID NUMBER From the DEPARTMENTS table DEPT_NAME VARCHAR2(30) From the DEPARTMENTS table Which SQL statement produces an error?（） [" SELECT * FROM emp_dept_vu;"," SELECT department_id, SUM(salary) FROM emp_dept_vu GROUP BY department _ id;"," SELECT department_id, job_id, AVG(salary) FROM emp_dept_vu GROUP BY department _ id, job_id;"," SELECT job_id, SUM(salary) FROM emp_dept_vu WHERE department_id IN (10,20) GROUP BY job_id HAVING SUM (salary) > 20000"," None of the statements produce an error; all are valid."]
栽植土表层处理按下列方式进行：
