??????
???
1???????
2???????2 cm2?
3?5%1%?
4???????50??
5?????
6??????????????
7???1 cm2??
8???50cm2??
9???30%??
10???34?????
11?????????
12???100 cm2?
13??????????
14????
15????????
16??0.5??0.8?
17??0.8?
18????????
19???1/3??
20?????
21?????????
22???????????
23??
24???
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26????
27?????
28??26 dB?56 dB?
29?????????
30?????
31???
32???1?2??
33??????????
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35??? ?
36???
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1???????
2???????2 cm2?
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4???????50??
5?????
6??????????????
7???1 cm2??
8???50cm2??
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10???34?????
11?????????
12???100 cm2?
13??????????
14????
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17??0.8?
18????????
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20?????
21?????????
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28??26 dB?56 dB?
29?????????
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35??? ?
36???
37?????
38?????
39??
40???
41???
42????
43???
44???
45???
46???
47??
48????
49...
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