单选题River currents tend to（）.APick up speed where the channel widensBRun slower in the center of the channelCHug the inside of a bendDCause the greatest depth of water to be along the outside of a bend
单选题
River currents tend to（）.
A
Pick up speed where the channel widens
B
Run slower in the center of the channel
C
Hug the inside of a bend
D
Cause the greatest depth of water to be along the outside of a bend
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