举一反三
- The larger the size of the cube specimen, the higher the compressive strength. A: 正确 B: 错误
- The compressive strength of brittle materials is generally （ ） than its tensile strength.。 A: higher B: equal C: lower
- Concrete is basically a compressive material and has good tensile strength.
- For concrete specimen subjected to uniaxial compression, the stress reaches the maximum when the strain reaches the ultimate compressive strain.
- Which of the following is NOT considered as a property of asphalt concrete? A: Thermal cracking resistance B: Tensile strength C: Compressive strength D: Fatigue crack resistance
内容
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Which of the following is correct for TLC using silica gel as absorbent? A: Higher the absorption activity of absorbent. larger k and smaller Rf B: Higher the absorption activity of absorbent. larger k and larger Rf C: Stronger the polarity of solvent. larger k and smaller Rf D: Weaker the polarity of solvent. larger k an d larger Rf
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Which one is correct for description of TLC using silica gel as absorbent? A: Higher the absorption activity of absorbent. larger k and smaller Rf B: Higher the absorption activity of absorbent. larger k and larger Rf C: Stronger the polarity of solvent. larger k and smaller Rf D: Stronger the polarity of solvent. larger k and larger Rf
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Which of the following descriptions is right? A: Asphalt with lower viscosity helps to increase the shear strength of asphalt mixture. B: The lower asphalt content, the higher shear strength of asphalt mixture is. C: The higher asphalt content, the higher shear strength of asphalt mixture is. D: Aggregates with dense framework structure helps to increase the shear strength of asphalt mixture.
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Which of the following describes a material with high compressive strength but lowtensile strength A: tough B: B. brittle C: C. ductile D: D. malleable E: E. resilient