Maths ____ one of the ____ subjects in middle school. [
| Maths ____ one of the ____ subjects in middle school. |
| [ ] |
| A. are; important B. is; most important C. is; more important D. are; much important |
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抛物线y=3x^2-1/2的对称轴是____,顶点坐标为____
1年前2个回答
你能帮帮他们吗