回收式自身输血的副作用不包括（）。
A.溶血倾向
B.细菌感染
C.肾功能不全
D.暴发性肝炎
E.出血倾向
参考答案：D
The reporter said that the UFO ________ east to west when he saw it.[ ]
A. was traveling
B. traveled
C. had been traveling
D. has traveled
