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)（）.

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

Low pressure disturbances，which travel along the intertropical convergence zone，are called（）.

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（）.

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

The presence of stratus clouds and a dying wind will usually result in（）.

Advection fog holds longest over which portions of the lakes?（）

Ocean currents are well defined and（）.

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

The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.