如图,AB∥EF∥CD,BC、AD相交于点O,F是AD的中点,则下列结论中错误的是( )
可得到氢气的质量为多少?可得到氧气的质量为多少?
the money the government offered, the pupils in the poor area could go back to school again.
寒流一般由高纬度流向低纬度,对沿岸地区气候起降温减湿作用.(判断对错)