The __________ system here, including a water-closet, is of the mostcomplete and modern kind.
A: climate
B: topographical
C: water
D: drainage
A: climate
B: topographical
C: water
D: drainage
举一反三
- The water used in the ship's sanitation system is generally _____. A: low temperature fresh water B: high temperature fresh water C: water produced by water generator D: seawater
- 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
- Which of the followingis not the main cause of water scarcity? A: war B: water contamination C: overpopulation D: climate change
- Where is the key A: In the closet door. B: Beside the water fountain. C: On the filing cabinet.
- Water is a kind of chemical substance.