高中语法问题,请详细解答1.Scientists working _B_ a problem they do not know sometimes can't even guess what the final result will be. A. out B. on C. for D. to C为什么不行?2.. As far as we know, there

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高中语法问题,请详细解答1.Scientists working _B_ a problem they do not know sometimes can't even guess what the final result will be. A. out B. on C. for D. to C为什么不行?2.. As far as we know, there 请解答,高中数学题! 高中值域问题﹑y=2|x|+3/x^2…详细解答, 数学题 请详细解答 请详细解答,高一化学 相对论 请详细解答 请告诉我详细解答. 请推荐一本高中英语语法练习书,要求里面的练习有详细的解答 高中数列题,求高手详解~!请给出详细解答过程,谢谢~! 高中一模数学题!高手进!一共两道题,谢谢请详细解答,答好有加分!~~~ 请详细解答一下高中微积分中基本初等函数公式的推导 请问第七题解决问题,怎么解答,请详细解答,谢谢. 高中数学题.求详细解答过程 高中数学题.第八题详细解答 高中物理题,求解答,要详细步骤 高中复数,要详细解答过程,谢谢 高中复数,求详细解答过程,谢谢 高中数列,求高手详细解答!