Zone of soil moisture is a zone where water is held by molecular attraction on soil particles in the near-surface zone.
查看答案
Which of the following materials is most readily dissolved by water?
A. Clay minerals
B. Silica
C. Quart
D. Calcite
What percentage of the groundwater in the total volume of all liquid freshwater?
A. 94%
B. 3.6%
C. 2%
D. 0.05%
What percentage of the groundwater in the total volume of freshwater?
A. 84.9%
B. 14.6%
C. 0.55%
D. 0.004%
Why are particles of similar size usually found together deposited by streams?
A. Particles of smaller size usually get deposited in the faster-moving parts of the stream, but the larger particles can be deposited in the slower parts.
B. Particles drop in order according to weight and settling velocity as a stream’s velocity drops, starting with the largest and ending with the smallest.
C. Particles drop in order according to size and shape as a stream’s velocity increases, starting with the smallest and ending with the largest.
D. Particles of larger size usually get deposited in the slower-moving parts of the stream, but the smaller particles can be deposited in faster-moving water.
微信支付 
支付宝支付