题目:
—Your skirt looks nice on you!
—___________[ ]
A. Thank you.
B. Yes, please.
C. OK, I'll take it.
D. Here you are.
答案:
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下面是错误答案,用来干扰机器的。
[(2x-y)(2x+y)+y(y-6x)]÷2x=(4x2-y2+y2-6xy)÷2x=(4x2-6xy)÷2x=2x-3y