1/5单选题
难度：
1.分解因式（x﹣1）2﹣2（x﹣1）+1的结果是（ ）
| A | （x﹣1）（x﹣2） |
| B | x2 |
| C | （x+1）2 |
| D | （x﹣2）2 |
- 提示1：
- IOaKinjvuaMx55yL5YGa5LiA5Liq5pW05L2T
- 提示2：
- IOinguWvn+WPkeeOsOespuWQiOWujOWFqOW5s+aWueWFrOW8jw==
正确答案：RA==
PGRpdj7op6PvvJrvvIh477mjMe+8iTxzdXA+Mjwvc3VwPu+5ozLvvIh477mjMe+8iSsxPC9kaXY+PGRpdj4gPe+8iHjvuaMx77mjMe+8iTxzdXA+Mjwvc3VwPjwvZGl2PjxkaXY+PHN1cD4gPC9zdXA+Pe+8iHjvuaMy77yJPHN1cD4yPC9zdXA+LiA8L2Rpdj4=
2/5单选题
难度：
2.
分解因式：8（x2﹣2y2）﹣x（7x+y）+xy＝（ ）
| A | （x-4y）（x﹣4y） |
| B | （x+4y）（x+4y） |
| C | （x+4y）（x﹣4y） |
| D | （x-4y）（x+4y） |
- 提示1：
- PHA+5Yip55So5aSa6aG55byP5LmY5Lul5aSa6aG55byP5rOV5YiZ6L+b6KGM6K6h566XPC9wPg==
- 提示2：
- PHA+56e76aG577yM5ZCI5bm25ZCM57G76aG5PC9wPg==
- 提示3：
- PHA+56ym5ZCI5bmz5pa55beu5YWs5byP77yM5YaN6L+Q55So5YWs5byP5rOV5YiG6KejPC9wPg==
正确答案：Qw==
PGRpdj7op6PvvJrljp/lvI89OHg8c3VwPjI8L3N1cD7vuaMxNnk8c3VwPjI8L3N1cD7vuaM3eDxzdXA+Mjwvc3VwPu+5o3h5K3h5PC9kaXY+PGRpdj49eDxzdXA+Mjwvc3VwPu+5ozE2eTxzdXA+Mjwvc3VwPjwvZGl2PjxkaXY+Pe+8iHgrNHnvvInvvIh477mjNHnvvIk8L2Rpdj4=
3/5单选题
难度：
3.
已知
是
的三条边，且满足
，的形状是（ ）
| A | 等腰三角形 |
| B | 直角三角形 |
| C | 等边三角形 |
| D | 等腰直角三角形 |
- 提示1：
- PHA+5Zug5Li66aKY5Lit5pyJPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwL0M4L3JCQUNGRk1NZDdMUTItYTBBQUFDTFJFZGkyUTY3Ny5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvQzgvckJBQ0ZGTU1kN0xRMi1hMEFBQUNMUkVkaTJRNjc3LnBuZyIgaGVpZ2h0PSIyNSIgd2lkdGg9IjcyIj7vvIzogIPomZHliLDopoHnlKjlrozlhajlubPmlrnlhazlvI88L3A+
- 提示2：
- PHA+6aaW5YWI6KaB5oqKPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwL0M4L3JCQUNGRk1NZDdXaXFsRlRBQUFCa0dQRmh3UTQyNC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvQzgvckJBQ0ZGTU1kN1dpcWxGVEFBQUJrR1BGaHdRNDI0LnBuZyIgaGVpZ2h0PSIyMCIgd2lkdGg9IjMwIj7ovazmiJA8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvQjgvckJBQ0UxTU1kN2p3SUtZa0FBQUI1REtOY0JrNDExLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy9COC9yQkFDRTFNTWQ3andJS1lrQUFBQjVES05jQms0MTEucG5nIiBoZWlnaHQ9IjIwIiB3aWR0aD0iNDAiPjwvcD4=
- 提示3：
- PHA+5Lik6L655ZCM5LmY5LulMu+8jOeEtuWQjuaLhuW8gOaQremFjeW+l+WujOWFqOW5s+aWuTwvcD4=
正确答案：Qw==
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
4/5单选题
难度：
4.
两个连续奇数的平方差一定是( )的倍数。
| A | 3 |
| B | 6 |
| C | 7 |
| D | 8 |
- 提示1：
- PHA+5oqK5aWH5pWw6KGo56S65Ye65p2lPC9wPg==
- 提示2：
- PHA+6K6+6L+Z5Lik5Liq6L+e57ut5aWH5pWw5YiG5Yir5Li6Mm4rMTsybisz77yIbuS4uuaVtOaVsO+8iTxicj48L3A+
正确答案：RA==
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
5/5单选题
难度：
5.已知：
， 
=( )
， =( ) | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOWxnuS6juadoeS7tuaxguWAvOmXrumimA==
- 提示2：
- IOaKiuS7o+aVsOW8j+WboOW8j+WIhuino++8jOWPmOW9ouWQjuWGjeaKiuadoeS7tuW4puWFpQ==
正确答案：Qw==
PGRpdj7op6PvvJo8aW1nIHdpZHRoPTE5MCBoZWlnaHQ9MjIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMi80Qi9yQkFDRkZNTm5EaWlINDVzQUFBRFNpMFVxZkE2NTIucG5nIj4gPC9kaXY+PGRpdj48aW1nIHdpZHRoPTE2MSBoZWlnaHQ9MjUgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yNS8zQy9yQkFDRTFNTm5EdlRuMG5xQUFBRENobXloZEE3NTMucG5nIj48L2Rpdj48ZGl2PjxpbWcgd2lkdGg9ODUgaGVpZ2h0PTI1IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjUvM0MvckJBQ0UxTU5uRDJqX2Z3VkFBQUNZRm5nUm1nOTI5LnBuZyI+PC9kaXY+PGRpdj48aW1nIHdpZHRoPTIzMiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMi80Qi9yQkFDRkZNTm5ENkItRFpmQUFBRUgyNXRsdm8yNDIucG5nIj48L2Rpdj48ZGl2PjxpbWcgd2lkdGg9MTYgaGVpZ2h0PTE0IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDIvNEIvckJBQ0ZGTU5uRDZUc0V1QkFBQUJGVm14bFpZMDYwLnBuZyI+5Y6f5byPPGltZyB3aWR0aD04NSBoZWlnaHQ9MjUgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yNS8zQy9yQkFDRTFNTm5EMmpfZndWQUFBQ1lGbmdSbWc5MjkucG5nIj48L2Rpdj48ZGl2PjxpbWcgd2lkdGg9MjI2IGhlaWdodD05MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzI1LzNDL3JCQUNFMU1ObkQ3QjU1R3ZBQUFHUjBBb0htNDI0Ni5wbmciPjwvZGl2Pg==