单选题A katabatic wind blows（）.A up an incline due to surface heatingB in a circular patternC down an incline due to cooling of the airD horizontally between a high and a low pressure area

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单选题

A katabatic wind blows（）.

up an incline due to surface heating

in a circular pattern

down an incline due to cooling of the air

horizontally between a high and a low pressure area

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BHave you ever wondered?1.Why do airplanes take longer to fly west than east?It can take five hours to go west-east from New York(NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon know as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes movement a constams air speed thus go faster in the west-east direction when the air moving with the wind than in the opposite direction.2 What would happen if the gravity on Earth was suddenly turned off?Supposing we could magically turn off gravity. Would buildings and other structures float away? What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed moving at over a thousand miles per hour. If you turn something round your head on a string, it goes around in a circle until you let go of the strong go of the string. Things not attacked to the Earth would fly off in a straight line . People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things would fly off into space.60.What information coa we get from the first passage?A.tis the iet stoomn that affeets how fast airplanes fly.B.Planes go slower when they are moving with the wind.C.It takes more time to fly from NY to London than from London to NY.D.The jet stream always blows from the east to the west across the Atantic.

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相关问题 2：

SHIFT OF WIND DIRECTION IN AN ANTICLOCKWISE MANNER, FOR EXAMPLE FROM NORTH TO WEST ( OPPOSITE OF VEERING ) defines ______.A.Backing (of wind)B.Veering (of wind)C.Shifting of windD.altering of wind

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相关问题 3：

The numeral in the center of a wind rose circle on a pilot chart indicates the ______.A.total number of observationsB.average wind force on the Beaufort scaleC.average wind force in knotsD.percentage of calms

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相关问题 4：

A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind ______.A.comes over the bowB.blows the fire back toward the vesselC.comes over the sternD.comes over either beam

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相关问题 5：

When recording the wind direction in the weather log，you would report the ______．A.direction the wind is blowing towardB.direction the wind is blowing fromC.duration of the maximum gust of windD.wind chill factor

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相关问题 6：

The velocity of the apparent wind can be more than the true wind，and come from the same direction，if certain conditions are present．One condition is that the ______．A.Ship's speed must be less than the true wind velocityB.True wind must be from dead asternC.True wind velocity must be faster than the ship's speedD.True wind must be from dead ahead

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相关问题 7：

A wind vane on a moving vessel shows ______.A.dead reckoning wind directionB.true wind directionC.apparent wind directionD.estimated wind direction

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海船船员考试

单选题A katabatic wind blows（）.A up an incline due to surface heatingB in a circular patternC down an incline due to cooling of the airD horizontally between a high and a low pressure area

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