1
1 2 1 2 1 2 3 1 2 3 2
3
1 355 110 403 62 1979 1998 17 1979 2 1996 70 10 4000 200 332 17 80 3000 1.7 1% 300 4
1998 60% 3.4% 0.9 3.6 40.8 37.4 17.3 0.3 4.4 42.6 36.0 16.7 7.1 3.6 67.9 10.7 10.7 3.2 65.6 15.6 15.6 1.9 6.4 47.1 31.0 13.6 3.1 4.7 51.5 34.4 6.3 2.7 48.7 35.1 13.5 1 2 3 5
6
7
8
9 58 200 59
S P 2 P P 1 O S D Q 1 Q Q 2 Q D O = Q = P P1 Q 2 Q 1 -Q 2 1997 46 41 46 40 46 44 30 Q 1 10
1 1987 4 20 10 6 2 1978 1 1998 4 2 39 1999 11
1978 10 6 1979 5 6 8 7 5 1984 10 1985 1979 1980 1981 1983 1985 1987 1988 1989 12
3 1992 1 1992 6 1993 16 1994 9 1994 1996 3 1995 13
14 4 6 2 4-10 U
15-1
2 3 1 2 3 1 2 16
Degree papers are in the Xiamen University Electronic Theses and Dissertations Database. Full texts are available in the following ways: 1. If your library is a CALIS member libraries, please log on http://etd.calis.edu.cn/ and submit requests online, or consult the interlibrary loan department in your library. 2. For users of non-calis member libraries, please mail to etd@xmu.edu.cn for delivery details.