问题
选择题
已知x＜1，则
|
答案
x2-2x+1
=(x-1)2
=|x-1|
∵x＜1，
∴原式=-（x-1）=1-x，
故选D．
搜题请搜索小程序“爱下问搜题”
已知x＜1，则
|
x2-2x+1
=(x-1)2
=|x-1|
∵x＜1，
∴原式=-（x-1）=1-x，
故选D．
书面表达（共1小题，满分15分） 校友王浩被邀请来你校作报告，谈中学生该如何高效地学习英语的问题。请根据下面表格提供的信息，在学校网页的“英语角”栏目上用英语对王浩作一简单介绍： 
1. 要点齐全。 2. 不要逐行翻译 3. 词数：100以上，开头和结尾已为你写好，不计入总词数。 研究生：graduate student；专业：major n & v ; 同声翻译员：simultaneous interpreter Mr.Wang Hao is a schoolmate of our school. He was born in March in 1978 in Changsha.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Tomorrow afternoon, he will give us a wonderful speech about how we should learn English effectively. Please be there on time. | ||||||||||||||||||||||||||||||