When practicing at the water's edge, one should ().
A: surface water
B: back to the water to practice
C: Practice side to water
D: Practice away from the water
A: surface water
B: back to the water to practice
C: Practice side to water
D: Practice away from the water
举一反三
- Which one is not the common source of injection water: A: surface water B: ground water C: distilled water D: oil polluted water
- According to the distribution of oil, gas and water, the water at the edge of containing edge is called (). A: External water B: Bottom water C: Edge water D: Edge bottom water
- Water treatment process for unpolluted surface water contains: influent, coagulation, ______ , ______ , disinfection, water supply network. (only one word for each blank)
- From this speech, what should we do to practice good personal hygiene? A: regularly wash our hands with soap and water B: avoid touching our face with our hands C: clean objects and surfaces that are touched often D: avoid raw food and unclean water
- Underground water supplies about（） A: 80% of Australia’s water B: 48% of Australia’s water C: 18% of Australia’s water D: 80% of Australia’s water