【简答题】Rivers are the veins of the Earth, transporting the water and nutrients ( 营养物 ) needed to support the planet’s ecosystems, including human life. While many nutrients are essential to the survival of l...
【简答题】AV Clip 5: The Importance of Water Listen to a passage three times and while listening, you are to put the missing word in each numbered blank according to what you hear. Experts say water is importan...