慢性支气管炎患者发作期,未得到病原体及药物敏感试验结果前,首选的抗生素为()
A. 头孢曲松
B. 甲硝唑
C. 利福平
D. 庆大霉素
E. 异烟肼
Which two statements complete a transaction?()
A. DELETE employees;
B. DESCRIBE employees;
C. ROLLBACK TO SAVEPOINT C;
D. GRANT SELECT ON employees TO SCOTT;
E. ALTER TABLE employees SET UNUSED COLUMN sal;
F. Select MAX(sal) FROM employees WHERE department_id = 20
下列细胞中不能合成蛋白质的是()
A. 胰腺细胞
B. 肠粘膜细胞
C. 成熟红细胞
D. 白细胞
A 200-year-old building is very old in American()
A. terms
B. points
C. outlooks
D. definitio