钟面上时针与分针的夹角为______度.计算:35°18′19〃+43°49′51〃=______.计算【三元】x+2y=3x-2y=12x+3y+z=6.5从A地到B地,如果行10千米/时,就提前30分钟到达;如果行9千米/时,就比原计划晚到0.5小时,
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![钟面上时针与分针的夹角为______度.计算:35°18′19〃+43°49′51〃=______.计算【三元】x+2y=3x-2y=12x+3y+z=6.5从A地到B地,如果行10千米/时,就提前30分钟到达;如果行9千米/时,就比原计划晚到0.5小时,](/uploads/image/z/15235584-24-4.jpg?t=%E9%92%9F%E9%9D%A2%E4%B8%8A%E6%97%B6%E9%92%88%E4%B8%8E%E5%88%86%E9%92%88%E7%9A%84%E5%A4%B9%E8%A7%92%E4%B8%BA______%E5%BA%A6.%E8%AE%A1%E7%AE%97%EF%BC%9A35%C2%B018%E2%80%B219%E3%80%83%2B43%C2%B049%E2%80%B251%E3%80%83%3D______.%E8%AE%A1%E7%AE%97%E3%80%90%E4%B8%89%E5%85%83%E3%80%91x%2B2y%3D3x-2y%3D12x%2B3y%2Bz%3D6.5%E4%BB%8EA%E5%9C%B0%E5%88%B0B%E5%9C%B0%2C%E5%A6%82%E6%9E%9C%E8%A1%8C10%E5%8D%83%E7%B1%B3%2F%E6%97%B6%2C%E5%B0%B1%E6%8F%90%E5%89%8D30%E5%88%86%E9%92%9F%E5%88%B0%E8%BE%BE%EF%BC%9B%E5%A6%82%E6%9E%9C%E8%A1%8C9%E5%8D%83%E7%B1%B3%2F%E6%97%B6%2C%E5%B0%B1%E6%AF%94%E5%8E%9F%E8%AE%A1%E5%88%92%E6%99%9A%E5%88%B00.5%E5%B0%8F%E6%97%B6%2C)
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