A. ROUTE ADD B. ROUTE CHANGE C. ROUTE DELETE D. ROUTE PRINT
A. SALARY <= 2000 AND SALARY >= 1000 B. SALARY < 2000 AND SALARY > 1000 C. SALARY = 1000 AND SALARY = 2000 D. SALARY = 1000 OR SALARY = 2000
A. 正确 B. 错误