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t/℃

σ/10^-3N·m^-1

t/℃

σ/10^-3N·m^-1

0

5

10

11

12

13

14

15

16

17

18

19

20

75.64

74.92

74.22

74.07

73.93

73.78

73.64

73.49

73.34

73.19

73.05

72.90

72.75

21

22

23

24

25

26

27

28

29

30

35

40

45

72.59

72.44

72.28

72.13

71.97

71.82

71.66

71.50

71.35

71.18

70.38

69.56

68.74