2023 英语周报 高二 GDY 39答案

2023 英语周报 高二 GDY 39答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本网站。

23.解:(1)f(x)+|x+a|≥|2x+1,即|x-a|≥1|2x+1,平方整理得3x2+2(2+a)x+1-a2≤0,分4+2a则-3,为方程3x2+2(2+a)x+1-a2=0的两根,3分3解得a=2,满足△>0分故所求a的值为2(2)∵f(x)=|x-a|-1x+al≤|(x-a)-(x+a)|=2lal6分.f(x)≤a2-2a,即2|a|≤a2-2a7分当a≥0时,2a≤a2-2a,解得a≥4或a=0;当a<0时,-2a≤a2-2a,解得a<0分综上,a的取值范围是(-∞,0]U[4,+∞)10分

第四部分写作(共两节,满分35分)增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。删除:把多余的词用斜线()划掉。修改:在错的词下画一横线,并在该词下面写出修改后的词注意:1.每处错误及其修改均仅限一词2.只允许修改10处,多者(从第11处起)不计分This sweet senior has been asking for a new pup since her last dogunexpected passed away last year. According togranddaughter, me, herfally came true earlier this month, just before my mother's presentingher withAunmarked cardboard box. Upon ore box andtheadorable pup sitting inside, the grandma burst into tear. My grandma isnt theonly oneappreciated the surprise. The video of my grandma's reacthas been " arawak thousands of hearts and likes on social media. Thisremind us that no matter how old you are at, just about every human alivewoutd'love to have a lovely new puppy in the house

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