____是商业银行负债业务的重要组成部分，是低成本资金的来源。

A. 数据域

B. 管理域

C. 服务域

D. 管理流程和机制 域

A. select * from teacher where tage between 30 and 40

B. select * from teacher where tage >= 30 and tage <= 40

C. select * from teacher where tage in (＇30＇,＇40＇)

D. select * form teacher where tage > 30 and tage < 40

A. 贴现

B. 转贴现

C. 再贴现

D. 回购

A. ALTER TABLE

B. INSERT INTO TABLE 表名

C. INSRERT INTO 表 名

D. DROP TABLE

A. while

B. 123XY

C. _age_20

D. Y470

A. 圆形

B. 矩形

C. 椭圆形

D. 菱形

A. f = open ("test.txt", "w"))

B. f = open ("test.txt", "write")

C. f = open( "write", "test.txt")

D. f = open("w","test. txt")