31.Water covers more than _______of the earth’s surface. A: 60% B: 70% C: 80% D: 30%

The best irrigation water is river water, pond water and lake water A: 正确 B: 错误

What water is used in the production of injection A: pure water B: purified water C: water for injection D: sterile water for injection

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

Which one is not the common source of injection water: A: surface water B: ground water C: distilled water D: oil polluted water

It's known to us all _______ a form of energy . A. water is B. that water is C. is water D. that water to

which water is more expensive? A: bottled water B: tap water

4．— Did you have anyone ______the trees? —Yes，l had the trees ______． A． to water ;water B． to water; watered C． water ; to be watered D． water; watered

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

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