ɽ|t(y)ˎߵȌƌW(xu)У
II(y)W(xu)D
ɽ|W(xu)D^
ɽ|W(xu)(j)У^(q)D^
ɽ|ʯͻW(xu)ԺD^
ώW(xu)Ժ
ɽ|һt(y)ƴW(xu)D^(j)
(f)W(xu)D^
ɽ|ڶt(y)ƴW(xu)D^
It(y)W(xu)ԺD^
It(y)W(xu)ԺD^