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1.2 �Uˮ

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2.2 �w��γəC��

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3 �YՓ

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�� īI ��

[1]�X��. �F(xi��n)�� Uˮ̎��¼��g[M].�� Ї� �ƌW ��g��,��1993.

[2]��p��.UASB��̎��׏Uˮ�w�� о� [J].�h(hu��n)��ƌW��1993,��12(3)��7-11.

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