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- 2已知x2+x-1=0,则x3-2x+4的值为_.
- 3She was trying to hide her joy .But can't you see that faint smile ( ) her face?
- 4若把x²+3x+c分解因式得到(x+1)(x+2),则多项式x²-3x+c分解因式为
- 5△ABC中,∠B=∠C,D为BC上一点,AB上取BF=CD,AC上取CE=BD,则∠FDE等于( ) A.90°-∠A B.90°-12∠A C.180°-∠A D.45°-12∠A
- 6用词的适当形式填空:Jim and Li Lei ___(watch) the football match this evening
- 7乘法分配律是常用工具.计算41.2×8.1+11×9.25+537×0.19.
- 831时=几分之几日
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- 10my cousin (goes to shanghai by train) every week .提问