單項(xiàng)選擇題A strong,often violent,northerly wind occurring on the Pacific coast of Mexico,particularly during the colder months,is a().

A.Papagayo
B.fall wind
C.foehn
D.williwaw


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2.單項(xiàng)選擇題A stretch where the channel changes from one side of the river to the other is called a().

A.crossing
B.transit
C.transfer
D.passing

3.單項(xiàng)選擇題A snag or other underwater obstruction may form a().

A.V-shaped ripple with the point of the V pointing upstream
B.V-shaped ripple with the point of the V pointing downstream
C.small patch of smooth water on a windy day
D.smoothing out of the vessel's wake

4.單項(xiàng)選擇題A section of the river that is narrower than usual and is often navigable from bank to bank is a().

A.chute
B.stabilized channel
C.slough
D.navigable pass

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In the Northern Hemisphere,a wind that shifts counterclockwise is a().

題型:?jiǎn)雾?xiàng)選擇題

Advection fog is most commonly caused by().

題型:?jiǎn)雾?xiàng)選擇題

The largest waves (heaviest chop) will usually develop where the wind blows().

題型:?jiǎn)雾?xiàng)選擇題

A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)().

題型:?jiǎn)雾?xiàng)選擇題

The apparent wind can be zero when the true wind is from().

題型:?jiǎn)雾?xiàng)選擇題

The place where a channel moves from along one bank of the river over to the other bank of the river is called a().

題型:?jiǎn)雾?xiàng)選擇題

The edge of a hurricane has overtaken your vessel in the Gulf of Mexico,and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the().

題型:?jiǎn)雾?xiàng)選擇題

The drift and set of tidal,river,and ocean currents refer to the().

題型:?jiǎn)雾?xiàng)選擇題

In most cases,the direction of the apparent wind lies between the bow and().

題型:?jiǎn)雾?xiàng)選擇題

Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the().

題型:?jiǎn)雾?xiàng)選擇題