与血栓的形成无关的是
A．心血管内膜损伤B．外源性凝血因子被激活C．血流缓慢或涡流D．内源性凝血因子被激活E．血流加快
参考答案：E
— Liu Yi, do you miss your parents? I hear that you go back home once every month.
— Of course. You know this is the first time I _____ in the dormitory at school, far away from my
hometown, Luoyang. [ ]
A. have stayed
B. stayed
C. stay
D. am staying
结构化开发方法中，数据流图是______阶段产生的成果。
A．需求分析
B．总体设计
C．详细设计
D．程序编码
