新险种可分为()。
A.完全创新的险种
B.模仿的新险种
C.换代新险种
D.改进的新险种
参考答案：A, B, C, D
It is hard for me to imagine what I would be doing today if I ________ in love，at the age of seven，with the Melinda Cox Library in my hometown.
A．wouldn't have fallen
B．had not fallen
C．should fall
D．were to fall
在UML的需求分析建模中，（）模型图必须与用户反复交流并加以确认。
A.配置
B.用例
C.包
D.动态
