题目

（x+y）2﹣x（2y﹣x） 答案：（x+y）2﹣x（2y﹣x） =x2+2xy+y2﹣2xy+x2 =2x2+y2．单词拼写1.The walk has given me a good __________.（胃口）2.People have realized the need to be in ___________ （融洽；一致）with our environment.3.She is always polite and c____________（考虑周到的；体贴的） towards her employees.4.You ___________（应得；值得）a good rest after all that hard work.5.She seems totally a____________（全神贯注） in her book.6.As a child, he was _________（控制；支配）by his father.7.Every one in the class seems e_________（热切的；渴望的）to learn.8.Stores are getting _________ （绝望的）after two years of poor sale.9.They have ___________ （任命）a new head teacher at my son’s school.10.We didn’t receive any news during his long __________.（缺席；不在）