高速柴油机连杆大端轴承拆检过程原则上必须对其螺栓进行长度测量及探伤检测。
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邮储银行的扣划交易由()授权后,经办人员根据协助扣划存款通知书办理扣划处理。
A. 综合柜员
B. 支行(局)长
C. 业务管理员
D. 业务主管
目前认为激光对生物机体的作用主要有热效应、电磁效应、光化效应、机械应力效应。
A. 正确
B. 错误
旋转劈相机为什么采用特殊的起动方法?简述旋转劈相机分相起动的原理及起动过程。
Examine the structure of the EMPLOYEES and DEPARTMENTS tables: EMPLOYEES EMPLOYEE_ID NUMBER DEPARTMENT_ID NUMBER MANAGER_ID NUMBER LAST_NAME VARCHAR2(25) DEPARTMENTS DEPARTMENT_ID NUMBER MANAGER_ID NUMBER DEPARTMENT_NAME VARCHAR2(35) LOCATION_ID NUMBER You want to create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join?()
A. SELECT last_name, department_name, location_id FROM employees , department ;
B. SELECT employees.last_name, departments.department_name, departments.location_id FROM employees e, departments D WHERE e.department_id = d.department_id;
C. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments D WHERE manager_id = manager_id;
D. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments D WHERE e.department_id = d.department_id