Water _________ in seas, rivers and lakes.
举一反三
- Where does the fresh water come fromIt comes from rivers, lakes and _________________________.
- Rivers, lakes and seas may be polluted by all of the following except ________. A: oxygen B: acid rain C: fertilizers D: waste material
- whichof the following is not the source of surface water? A: rivers B: ice C: reservoirs D: lakes
- Lakes, rivers and underground water supplies have all been badly polluted by lightly regulated industry.
- -- The water changes into thick ice covering rivers and lakes in winter in Harbin. -- ______ in Urumqi and children go skating on it then.