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【解答】解:令t=x-1,x=什1,xE[-1,3],[-2,2],g(t)=(2-1)sin+t,te[-2,2],所以f(x)=(x2-2x)sin(x-1)+x+13=(2-1)sin+什14=g(t)+14,因为g(t)是奇函数,所以gmr(t)=g(t0),gmim(t)=g(-0)=-g(t0),所以M=gmm(t)+14=g(t0)+14,m=gmim(t)+14=-g(t0)+14,所以M什m=g(t0)+14+(-g(0)+14,)=28,故选:A.
第二节书面表达Dear Tony,How is everything going?I'm writing to tell yousomething about our school poetry reading presentation.Aimed at improving our artistic appreciation,ourschool is to hold a poetry reading show in the schoolhall this Saturday.At 8 am an opening ceremony willstart with our headmaster delivering a speech,afterwhich,classic Chinese poems from different dynastieswill be presented.Twelve programs will be covered.Since you are keen on ancient poetry,why notcome in person and watch the live show?Looking forward to your early reply.Yours,Li Hua
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