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: 4/4

(U/U)2å80% = 1,98*10-7 + 1,8*10-3 + 10-3 = 2,8*10-3

 

= -51,1

= 61 + 10lg(2500/L) (5.10)

堠 L - ˠ L = 560

 

= 61 + 10lg(2500/560) = 64

 

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6.

 

 

1. .. , ..

. 1996

2. .. , ..

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1987

3. ..

1974



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: 2004-09-01 (0 )