Jack has gone to the library.Bill has gone gone to the library too合并一句

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• Jack has gone to the library.Bill has gone gone to the library too合并一句
• Jack has gone to the library.Bill has gone gone to the library too合并一句
• Many peole were mada( )the wall away from their homes.A、work on B、to work on C、worked onI went to return the book to Jack,but I couldn't find him .He( )the library.You can find him there.A、has been to B、has gone to C、has left谢1L，不过第2题我们老师说是a，你确定选b吗？
• has been to he has gone 有什么区别? 例题： Tonm ,can you tell me where jack is ? He -------to the例题： Tom ,can you tell me where jack is ? He -------to the library. A has gone B had gone C has been 我自己是想选择B的,但是答案选着了C 为什么?我自己想的是：Tom,你能告诉我Jack去了哪里? 他已经去了图书馆,
• 从距地面15m高的楼顶,以10m/s的速度抛除一个小球,不不计空气阻力,地面为0势能面,从距地面15m高的楼顶,以10m/s的速度抛除一个小球,不不计空气阻力,地面为0势能面,求此球在多高处重力势能与动能相等?
• 小球从5m高*下落,不计空气阻力,g =10m/s2,求(1):经多长时间才落到地面?(2):刚要落地时速度多大?...小球从5m高*下落,不计空气阻力,g =10m/s2,求(1):经多长时间才落到地面?(2):刚要落地时速度多大?