單項(xiàng)選擇題

The height of a wave is the vertical distance（）.

A.from the still water plane to the crest
B.from the still water plane to the trough
C.from crest to trough
D.between water levels at one-quarter of the wave's length

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單項(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（）.

A.navigable semicircle
B.dangerous semicircle
C.low pressure area
D.eye of the storm

單項(xiàng)選擇題

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

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

The height of a wave is the vertical distance（）.

你可能感興趣的試題

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（）.

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

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（）.