对角塔腿断面
参考答案：
通过杆塔对角塔腿对角线的垂直平面上的地面轮廓线。
需要吸氧治疗的疾病是（）
A.急性肺水肿
B.安眠药中毒
C.急性胃炎
D.脑外伤
E.胎心音不良
I don't know why she's looking at me ______ she knew me. I've never seen her before in my life. [ ]
A. as
B. although
C. even if
D. as if
