( )是国务院组成机构(委员会、部、局)根据职责分工和行业特点制定的规范性文件。这些规范性文件通常在制定和颁布的委、部、局所管辖的业务范围具有约束效力。

A．法律
B．部门规章
C．技术规范
D．行政法规

All of the tickets for two real estate seminars, F and G, were either purchased or given away, and the ratio of F tickets to G tickets was 2 to 1. Of the total number of F tickets and G tickets, what percentage was purchased ？（）
(1)The total number of F tickets and G tickets is 240.
(2)Of the F tickets, exactly 60 percent were purchased, and of the G tickets, exactly 80 percent were purchased.

A．条件(1)充分，但条件(2)不充分．

B．条件(2)充分，但条件(1)不充分．

C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．

D．条件(1)充分，条件(2)也充分．

E．条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．