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- 1一辆汽车从东城开往西城,行了一段路程后,离西城还有210千米,接着又行了全程的20%,这时已行路程与未行路程的比是3:2.东、西两城相距多少千米?
- 2在浓度为50%的酒精溶液中加入5千克水,浓度变为30%,再加入多少千克酒精,浓度变为50%?
- 3已知多项式6x^2-2mxy-2y^2+4xy-5x+2中不含有xy项,求代数式-m^3-2m^2-m+1-^3-m+2m^2+5的值
- 4my dear I miss you all the time啥意思
- 5Bob stayed at home with his mother because he had no f---- to play with
- 6Do you have anything to say for yourself ?---Yes,there's one point ___we must insist on.
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- 8英语中乐器drum前用加the吗?
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