长t

t
0
8
t
0
7
t
0
9
t
0
11
t
0
6
t
0
4
t
0
8
t
0
6
t
0
5
t
0
7
t
0
6
t
0
8
t
0
7
t
0
5
t
0
4
t
0
5
t
0
6
t
0
6
t
0
5
t
0
5