1/5单选题
难度：
1.
等于（）
等于（） | A | － |
| B |  b2x |
| C | |
| D | － |
- 提示1：
- 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
- 提示2：
- 6IO957qm5YiG55qE6KaB57qm5YiG
正确答案：QQ==
6Kej562U77yaPGltZyB3aWR0aD04NCBoZWlnaHQ9NDUgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My8xQy9yQkFDRTFUSWwxN1JKYzRyQUFBRHBQMnp0eXczOTQucG5nIj4gPTxpbWcgd2lkdGg9OTAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQTgvckJBQ0psVElsMS1odzMtMEFBQUMwUTBldFdZODIyLnBuZyI+PS08aW1nIHdpZHRoPTMyIGhlaWdodD00NSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0FBLzI1L3JCQUNGRlRJbDE3eHBwcmpBQUFDU2tmRmppMDI0MC5wbmciPjxicj7mlYXpgIlB
2/5单选题
难度：
2.计算
的结果是 ( )
的结果是 ( ) | A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- 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
- 提示2：
- 5YiG5byP55qE5LmY6Zmk5re35ZCI6L+Q566X77yM5YWI5oqK6Zmk5Y+Y5oiQ6Zmk77yM54S25ZCO5oyJ6aG65bqP6K6h566X
正确答案：Qg==
6Kej562U77yaPGltZyB3aWR0aD0xMzUgaGVpZ2h0PTU2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMjUvckJBQ0ZGVElsNVhocTBZTkFBQUVsQWw3ejY4OTE0LnBuZyI+ID08aW1nIHdpZHRoPTg3IGhlaWdodD02MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzczLzFEL3JCQUNFMVRJbDVhQ2RWSkpBQUFDU2lOdE9YYzY2Ny5wbmciPj08aW1nIHdpZHRoPTQwIGhlaWdodD01NiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzFDL3JCQUNFMVRJbDVXejk1LTlBQUFDQmhTNVA3MDkzNC5wbmciPjxicj7mlYXpgIlC
3/5单选题
难度：
3.
计算1÷1+m1−m (m2−1) 的结果是( )
| A | -m2-2m-1 |
| B | -m2+2m-1 |
| C | m2-2m-1 |
| D | m2-1 |
- 提示1：
- 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
- 提示2：
- 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
正确答案：Qg==
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
4/5单选题
难度：
4.计算
的结果为( )
的结果为( ) | A |  |
| B | x3y3z |
| C | xy4x4 |
| D | y5z |
- 提示1：
- 5LmY5rOV5rOV5rWL77yaPGltZyB3aWR0aD0xNyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9FNy9yQkFDSjFUSWwxLVROd21MQUFBQmxlSllza2MxMTUucG5nIj7CtzxpbWcgd2lkdGg9MTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUMvckJBQ0UxVElsMS14M1RXeUFBQUJqUGdoV1ZrNDk0LnBuZyI+PTxpbWcgd2lkdGg9MjYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUMvckJBQ0UxVElsMkt3aHpsekFBQUNHQ0pLdmdBOTY2LnBuZyI+Lg==
- 提示2：
- KDxpbWcgd2lkdGg9MTcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTcvckJBQ0oxVElsMS1UTndtTEFBQUJsZUpZc2tjMTE1LnBuZyI+KTxzdXA+bjwvc3VwPj08aW1nIHdpZHRoPTI1IGhlaWdodD00NSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0FBLzI1L3JCQUNGRlRJbDJMVEgyYVVBQUFCMlRMVHRpQTAxNC5wbmciPiAobuS4uuato+aVtOaVsCk=
正确答案：Qg==
6Kej562U77yaPGltZyB3aWR0aD0xMjQgaGVpZ2h0PTU2IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTcvckJBQ0oxVElsMkxpWlhGVUFBQUV2M1BMWm9BMTE0LnBuZyI+ID08aW1nIHdpZHRoPTEzNCBoZWlnaHQ9NjIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9BOC9yQkFDSmxUSWwyS3prbmFGQUFBRFcxQjN0Rk0xNDcucG5nIj49IHg8c3VwPjM8L3N1cD55PHN1cD4zPC9zdXA+eg==
5/5单选题
难度：
5.当x=2，y=-3时，代数式
的值为____.
的值为____. | A |  |
| B |  |
| C | 4 |
| D |  |
- 提示1：
- 5LmY5rOV5rOV5rWL77yaPGltZyB3aWR0aD0xNyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9BQS8yNS9yQkFDRkZUSWw1WHc5MDM1QUFBQmxSSWZjV3M3NTYucG5nIj7CtzxpbWcgd2lkdGg9MTggaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQTkvckJBQ0psVElsNVhTa0JKU0FBQUJqUGdoV1ZrNDAwLnBuZyI+PTxpbWcgd2lkdGg9MjYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTcvckJBQ0oxVElsNWFoQlJ6UkFBQUNHQ0pLdmdBNDA4LnBuZyI+Lg==
- 提示2：
- 5YiG5a2Q5YiG5q+N5piv5aSa6aG55byP5pe277yM6KaB6L+b6KGM5Zug5byP5YiG6Kej77yM6IO957qm5YiG55qE6KaB57qm5YiG
正确答案：Qg==
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