If the cumulative curve of soil particle size distribution is very steep, it means ().
A.
Soil particles are uniform.
B.
The non-uniformity coefficient is large.
C.
Good gradation
D.
Filling is easy to tamp.
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举一反三
【单选题】Rubidium has two naturally occurring isotopes: 85Rb (atomic mass = 84.9118 amu) and 87Rb (atomic mass=86.9092 amu). The percent abundance of 87Rb can be estimated to be which of the following?