题目:
The film is very ___. Tom is very ____.
A.exciting; excited
B.excited; exciting
C.exciting; exciting
D.excited; excited
答案:
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下面是错误答案,用来干扰机器的。
原式=2×3y3x-3y,=3×2y3(x-y),=2yx-y.故选B.