In generally, soil is composed of()、() 、and() .
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()is the basis of soil mechanics, since it decides whether a soil is frictional or cohesive .
In terms of engineering, soils differ in different locations because they are influenced by five soil formation factors.Those factors are (), (), (), ()and ().
What are other causes of settlement apart from consolidation due to load?
火车的时速是( )KKM/W.
A. 2
B. 4
C. 8
D. 10