2021-2022 英语周报 高一 课标 OT答案

书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

22.解:(1)当a=3时,f(x)=loga3}由f(x)>0,得1og2(+3)>01解得x <或x> 0即原不等式的解集为xx>0或x<-1(5分2)∵函数f(x)在区间[t,t+1]上单调递减∴f(t)-f(t+1)≤1,即og(1+a)-g(i+a)≤1,即+a≤2a即(t+i恒成立(8分)设1-=,则0≤≤11-11-m2t(t+-1)3r+2当,将一3+2=0,当0不≤时,2-3+2r23y=+2在(]上单调递减,4=92∴实数a的取值范围是2(12分)

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