在UML提供的图中，可以采用 (6) 对逻辑数据库模式建模； (7) 用于接口、类和协作的行为建模，并强调对象行为的时间顺序。
参考答案：类图
It is generally believed that teaching is ________ it is a science.
A．an art much as
B．much an art as
C．as an art much as
D．as much an art as
用旋转法求AB直线的实长和与V面的夹角β。
