( )1. A. She is Miss Gao. ( )2. A. He’s in Class 4. ( )3. A. He’s twelve. ( )4. A. She’s at school today. ( )5. A. It’s under the bed. | B. Alice. B. He’s very old. B. She’s in Class 1. B. A teacher. B. They are under the bed. | C. His name is Peter. C. He’s thirteen. C. He’s in Class 2. C. He’s on the playground. C. He’s under the bed. |
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你能帮帮他们吗
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试说明无论x取怎样的值代数式(8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3x+3x³-3)的值都与x无关
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