2-23.His English textbook is missing.He is going to buy it immediately after class.it 错了 应该改为 为什么~

一个多重相关的分式二次型极值问题求形如[TeX]{(alpha^TSigma_{21})^2}/{alpha^TSigma_{22}alpha}[/TeX],其中[TeX]alpha[/TeX]与[TeX]Sigma_{21}[/TeX]为[TeX]nxx1[/TeX]向量,[TeX]Sigma_{22}[/TeX]为[TeX]nxxn[/TeX]正定矩阵.答案为[ tex是什么意思 jaycee is his english gore tex是什么 tex箱子什么意思 g-tex 什么意思? first-tex是什么意思 GORE TEX是什么? gore tex是什么 gore tex是什么 Oeko-Tex 怎么读 23.His great progress in English made his parents really ____.填什么 jim is talking---------his teacher ---------------his english. 英语：1篇阅读理解填词.Can a boy have a MAMA and not a MOTHER?Tex Clark did.He didn’t have a r 1 home.His father and mother were dead.He had to work from an early a 2 .Then one day a circus (马戏团) found him and let him j 3 it.He was his english name is tom These---(be)his English books oeko-tex 100与oeko-tex 1000有什么区别 “Tex”在纺织中是什么意思?