85
1
.(s )" " 60% 50% 40%
• " "
70%
.
•
.
.
•
.
.-12-
• -12- /
.(t ) -12-
↵
.
↵
.-12-
/
.
1
.
2
.
3
.
4
(IAI)
1-3
4-6-
7-9-
10-12
.
.
1 .
↵ .
2 .
↵ -12-
.
↵ " "
.
IAI
.
↵ 30
.
3 . 3
• /
.
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