软件测试中的白箱测试属于一类对软件结构的测试方法，它往往将程序视为一组______的集合。
参考答案：逻辑构件
She was certainly not afraid of the dark. ____,it was only a 15-minute ride home. [ ]
A. However
B. Besides
C. Therefore
D. Otherwise
鼠疫流行特征
