,
1
2
3
4
5
6
( )
-
?
1
...
3
4
5
6
7
8
9
10
11
12
13
14
15
...
22
- , ,
, 50%
!
r R X[ x x b ()
17 " ()"
PR- (2009)
,
(. 1 )
1
...
3
4
5
6
7
8
9
10
11
12
13
14
15
...
22
: