移民美国的好处和坏处

the professor wants to predit the problems and needs of human population and its incressing impact on natural resources like water and land. 4551 什么意思? the professor wants to predict the problems and needs of human population and its increasing impact on natural resources like water and land.4551 想知道的语言点：1—the professor wants to predict the problems and needs of human population ·(译成中文)professor of psychiatry and human behavior at UC Irvine(什么是UC Irvine) thc family of linear systems什么意思 The particle size of sugar.这句话怎么翻?The particle size of sugar is of significance and it has been shown that castor sugar of small crystal size promotes better aerating ability than either coarser (A1) or finer (icing sugar). Finite-time stability of linear time-varying systems with jumps,翻译成中文是什么啊,线性系统类文章 我可以问一下为什么kx-2（x-1/3y^2)+（-3/2x+1/3y^2） =kx-7/2x+y^2 若方程组4x+3y＝14 kx+（k-1）y＝6 的解中x与y的值相等,则k＝（）（求过程,这种题我总是不会做啊啊） y=kx+b中k＜0说明什么,K数字越大,说明什么? 一次函数y=kx+b（k≠0）的图像经过点（2、-2）和（-1,1）,求它的函数解析式,并说明点（5,-5）在该图像上吗? 一直角三角形三边长分别为5、12、13,斜边延长x,较长的直角边延长x+2,所得的仍是直角三角形,则x=? 一直角三角形三边长分别为5,12,13,若把斜边延长x,较长的直角边延长x+2,所得的仍是直角三角形,则x=? 【急】一直角三角形三边长分别为5,12,13,若把斜边延长x,较长的直角边延长x+2,所得的仍是直角三角形,则x=? 直角三角形的三边长分别为5,12,13,斜边延长x,较长的直角边延长x+2,所得的仍是直角三角形,那么x=? soon什么意思 一直角三角形三边长分别为5,12,13,斜边延长x,较长的直角边延长x+3所得的仍是直角三角形,则X=____ you go too far a little是什么意思 It Reminds Me Of You 歌词 朱自清写的《背影》第五段两次写到父亲的背影,前一次很详细后一次很简略的原因是什么 soon的意思 success Soon 3 2 1 now是什么意思 do u mean u want to go abroad for education什么意思 急用 求you in me me in you 这首英文歌曲的地址《假如爱有天意》里面的 Obama-care啥意思? He and I are best friends,So I am f_ with him very much Maybe I in your heart isn't so important.BUT So I am f_ with him very much.填词He and I are best friends,So I am f_ with him very much 斜边长为13,一条直角边长为12的直角三角形面积为__. He doesn't want to disappoint anybody caring for him.句中的care是什么用法? 把practise（练习）变成ing形式,需不需要去e后,才加ing呢?（还是直接加?） 请从语法角度分析句子He is selfish,only caring about himself.里care为什么要用ing形式 Nobody like you so important in my heart,girl.