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
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
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
A、extending out from a bluff alongside the river B、that tends to give a false indication of its position C、that has a sharp drop off into deep water D、that is perpendicular to the current
A、position and area of the current B、speed and direction toward which the current flows C、type and characteristic of the current's flow D、None of the above
A、A.clockwise around the North Atlantic and North Pacific Oceans B、B.clockwise or counterclockwise depending on whether it is warm or cold current C、C.counterclockwise except in the Gulf Stream D、D.counterclockwise around the North Atlantic and North Pacific Oceans
A、in many places a counter current flows in opposition to the main current close to the bank B、current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the wind C、as speed is reduced,the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructions D、when close to the berth in a head current,there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces