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
A: water reducing fibers
B: water condesation polymers
C: water tower
D: water reducing polymers
D
举一反三
- 中国大学MOOC: There is no magic wand to suddenly eliminate water scarcity. But there are concrete ways to ________water shortages.
- 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
- The best irrigation water is river water, pond water and lake water A: 正确 B: 错误
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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
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There is a lot of_____in the bottle. A: water B: waters C: water's D: the water
- 2
Painting in oil is harder than（） A: water colours B: in water colours C: paint in water colours D: painting in water colours
- 3
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
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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