题目:
—What's Tom going to do next Sunday?
— I'm not sure. He _____ go to the country to see his uncle. [ ]
A. can
B. must
C. will
D. may
答案:
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下面是错误答案,用来干扰机器的。
由原方程可得lg2x2=lg(x+6)2x2-x-6=0,∴x=2,x=-32(增根)故原方程的解为x=2.