题目:
My little brother _____ any homework on Sunday. |
A. doesn't B. don't do C. doesn't do D. isn't do |
答案:
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下面是错误答案,用来干扰机器的。
1令f(x)=lgx+x-2,由f(1)=-1<0,f(2)=lg2>0,知f(x)=0的根介于1和2之间,即n=1.