D值

0

1

2

3

4

5

6

7

8

9

均值

危险等级

1

4.5

0.5

0.25

3.5

0.5

1.5

3.5

0.5

0.5

210

22.525

D

2

0.6

3.5

18

9

42

2.8

9

3.5

42

700

83.04

C

3

70

10

3

60

10

700

60

10

42

18

98.3

C