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- 1I think there will be( )cars and less pollution in the future.I agree with you.
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- 3函数y=(1/2)^(-x^2+2x)的值域和单调区间
- 4有一个电能表标有3000转/千瓦时,有一个用电器在10分钟内使电能表转了320转,求该用电器消耗的电能和功率?谢
- 5形容某人做事很专注的词
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- 7请大家帮我解决一下下面的数学题!
- 8(解几)已知椭圆一个焦点到长轴两个顶点间的距离分别是33、3,则椭圆的离心率是 _ .
- 9Jack spent $85 on some books and 30% of his remaining money on clothes.He then had 20% of his.
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