烧杯内有燃着的两支高低不同的蜡烛如图所示沿着烧杯慢慢地倾倒co2观察到的现象是下面的蜡烛先熄灭上面的蜡烛后熄灭这说明co2的两点 Template




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tomski烧杯内有燃着的两支高低不同的蜡烛如图所示沿着烧杯慢慢地倾倒co2观察到的现象是下面的蜡烛先熄灭上面的蜡烛后熄灭这说明co2的两点 coloring