下列哪项不是控制性降压的适应证（）
A.颅内血管瘤
B.垂体瘤
C.全髋关节成形术
D.PDA结扎术
E.低血容量
参考答案：E
Mary was very busy last week. She did the work all ______ herself. [ ]
A. in
B. on
C. at
D. by
气割参数有哪些？
