UID:167802
UID:150200
UID:236342
UID:119126
UID:232894
UID:275058
UID:306489
janiusxw: @=jcdn!\M 好像给出的公式有点问题 MYqxkhcLH1 R=b*b/a L|DSEth k=-(a*a-b*b)/(a*a) qwka77nNT 前面要带符号 ,O=@I