下列各式不能用平方差公式计算的是[ ]
A.(a+2b)(a﹣2b)
B.(x+y)(y﹣x)
C.(﹣xy+1)(﹣xy﹣1)
D.(t﹣3)(3﹣t)
答案:D
---Do you think the micro-blog really_______ a platform_______ people to show their opinions?
---Yes, I think so.
A. offers; for B. provides; for C. provides; with
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