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美国“开端计划”

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审核中发现某些船员业务素质不能达到令人满意的水平如何处理？

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有效教学评价要求对学生评价坚持三个发展的评价宗旨，即（）、（）和（）。

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在一个构造盆地内，油气聚集单元的规模由小到大依次划分为油气藏、油气田、油气聚积带、含油气盆地。

A. 正确
B. 错误

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Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE NEW_EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid?（）

A. DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);
B. DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);
C. DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');
DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey')

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