ϺF(xin)I(y)W(xu)Ժ
ɽ|˾I(y)W(xu)ԺD^
ɽ|ڄI(y)g(sh)W(xu)ԺD^
RW(xu)Ժ У^(q)
RW(xu)ԺУ^(q)D
ŮӌW(xu)Ժ