You enable block change tracking. You issue the following command: BACKUP INCREMENTAL LEVEL 0 DATABASE; The next day, you issue the following command: BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which statement about the use of the change tracking file is true?（）

A、RMAN reads the block change tracking file only when it performs the incremental level 0 backup.

B、RMAN reads the block change tracking file when it performs both incremental backups.

C、RMAN reads the block change tracking file only when it performs the incremental level 1 backup.

D、RMAN does not read the block change tracking file when it performs either incremental backup.

You need to produce a report for mailing labels for all customers. The mailing label must have only the customer name and address. The CUSTOMERS table has these columns: Which SELECT statement accomplishes this task?（）

A、 SELECT* FROM customers;

B、 SELECT name, address FROM customers;

C、 SELECT id, name, address, phone FROM customers;

D、 SELECT cust_name, cust_address FROM customers;

E、 SELECT cust_id, cust_name, cust_address, cust_phone FROM customers;

下述界面哪一种不是操作系统为用户提供的界面（）。

A、命令

B、音像

C、程序

急性肾小球肾炎的治疗措施中不正确的是（）

A、1～2年内避免重体力活动和劳累

B、有水肿及高血压者每日盐摄入量2～3g／d

C、鼓励患者摄入优质蛋白，摄入量约1g／d

D、应用激素及免疫抑制剂

E、可用中药辅助治疗

Windows Professional继承了（）的稳定性，可靠性和安全性。

A、Windows 98

B、Windows XP

C、Windows Me

D、Windows NT

良性前列腺增生，术后气囊导管的拔除时间是术后的（）

A、7天内

B、10天

C、14天

D、2～3天

E、7天