下面不属于PowerDesigner 的Data Architect模块作用的是

A．运用E-R图，建立概念数据模型

B．针对特定的DBMS特点，生成相应的物理数据模型(PD

C．对已有数据库和应用的逆向工程

D．生成实体联系模型图(E-R图)

Monsoons are characterized by（）.

A.light，variable winds with little or no humidity

B.p，gusty winds that blow from the same general direction all year

C.steady winds that reverse direction semiannually

D.p，cyclonic winds that change direction to conform to the passage of an extreme low pressure system