2022 英语周报 高二 课标 20答案

12.D由f(-x)=ln(-x)2-2hn[(-x)2+1]=hx2-2ln(x2+1)=f(x),可知函数f(x)为偶函数;不妨设x>0,此时f(x)=2Inr-2In(r +1=2In+1x2+1=(当且仅当x=1时取“=”),有0<;≤,可得(12=-22可知函数f(2)的值域为(-,-22]:由/()=h1-2n1--m-25+h=h2-hn/()=h-21-2n≠/(是),可知当>0时,函数()的图象不关于直线x=1对称;由函数y=x+-(x>0)的增区间为(1,+∞),减区间为(0,1),可知函数f(x)的增区间为(-∞,-1),(0,1)

【语篇导读】本文是记叙文。在疫情禁足期间,只爱尔兰的海豚因缺少粉丝互动变得非常不安。心地善良的渔民弗兰纳里每天两次出港去陪伴他,以确保海豚不会感到孤独。24A【解柝】细节理解题。根据第一段“ some aremissing their human friends. Fungie, the Dolphin isone such animal”和第二段“ Fungie has gained theattraction of tourists”可知,这只海豚对人类非常友好。故选A。25D【解析】细节理解题。根据第三段“ flannery notheads out of Dingle harbour twice a day to make surethat the dolphin does not have to suffer the lockdownbues!"可知,到 annery是通过每天陪伴海豚来消除他的寂寞的。故选D。26.A【解析】推理判断题。根据第四段“ But they weretoo busy heading to the fishing grounds."可知,因忙于赶往渔场;渔船对海豚不予理睬。故选A。27C【解析卜词义猜测题。根据第一段“whie: humansare locked up inside their homes”和第三段“ to makesure that the dolphin does not have to suffer the lock-down blues”可知,渔民陪伴孤独的海豚是在灾情下发生的事,C项“灾难的”符合文意。故选C

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