中国大学MOOC: There is no magic wand to suddenly eliminate water scarcity. But there are concrete ways to ________water shortages.
举一反三
- The people living in the United States will not be faced with water shortages.
- Which of the followingis not the main cause of water scarcity? A: war B: water contamination C: overpopulation D: climate change
- Modern concrete blends are reinforced with steel fibers and __________ for strength and to prevent cracking.( ) A: water reducing fibers B: water condesation polymers C: water tower D: water reducing polymers
- Animal agriculture can’t be developed in northwest area due to severe water shortages.
- Animal agriculture can’t be developed in northwest area due to severe water shortages.