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- 1已知F是抛物线y2=x的焦点,A,B是该抛物线上的两点,|AF|+|BF|=3,则线段AB的中点到y轴的距离为( ) A.34 B.1 C.54 D.74
- 2一项工程甲、乙两人合作20天才能完成,现在这个工程由甲、乙两人合作8天,余下的工程由甲独做36天才能完成,问余下的工程若由乙一人独做需几天才能完成?
- 3—Is this kite ____,Tom?—Yes,it’s mine.It’s made by ____.A.yours; myself B.mine; myself C
- 4铺铁轨:平均每3米铁轨铺5根枕木,铺4.5千米长的铁轨需要多少根枕木?
- 53个战争词语连在一起造句
- 6He's plays vollbay very well的同义句
- 7I don't know the way.can you tell me how()(get)there.用所给动词适当形式填空
- 8They did it do help out three kids whose parents were killed in a car accident.
- 9当点B(x',y')在椭圆x=2cosθ,y=3sinθ(θ为参数)上运动时,求动点p(x'+y’,x’-y’)的轨迹的普通方程
- 10某商品的进价是120元,销售价是150元,求此商品的利润率