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A.等腰三角形 | B.直角三角形 | C.钝角三角形 | D.等边三角形 |
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A.a2•a3=a6 | B.(a2)3=a6 | C.a2+a3=a6 | D.a2-a3=a |
A.-a5+m | B.a5+m | C.a5m+n | D.-a5m+n |
A.x2+x3=x5 | B.(x2)3=x6 | C.(x-2)2=x2-4 | D.x•x-1=0 |
A.a2+a3=a5 | B.(a-b)2=a2-b2 |
C.(2x2)3=6x6 | D.(a+1)(a-1)=a2-1 |
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