在完全二叉树的顺序存储中，若结点i有左子女，则其左子女是结点 【5】 。
参考答案：2i
My math teacher ________ me, because he ________ I failed my test.[ ]
A. is angry for, find out
B. was angry with, found out
C. is angry with, find out
D. was angry with, find in
胸壁损伤中最易发生纵隔扑动的是（）
A.闭合性气胸
B.开放性气胸
C.张力性气胸
D.血胸
E.多根肋骨骨折
