单项选择题When a tornado moves over the water from land it is called a().

A.Tornado
B.Waterspout
C.Hurricane
D.Cyclone


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1.单项选择题Wen a hurricane passes over colder water or land and loses its tropical characteristics,the storm becomes a(n)().

A.High pressure area
B.Extratropical low-pressure system
C.Tropical storm
D.Easterly wave

2.单项选择题When a hurricane passes into high latitudes over colder water and the source of heat is disrupted,the storm assumes the characteristics of().

A.a high pressure area
B.an extratropical cyclone
C.a tropical storm
D.an easterly wave

3.单项选择题What kind of pressure systems travel in easterly waves().

A.High pressure
B.Low pressure
C.Subsurface pressure
D.Terrastatic pressure

4.单项选择题What kind of conditions would you observe as the eye of a storm passes over your ship’s position().

A.Huge waves approaching from all directions,clearing skies,light winds,and an extremely low barometer
B.Flat calm seas,heavy rain,light winds,and an extremely low barometer
C.Flat calm seas,heavy rain,light winds,and high pressure
D.Huge waves approaching from all directions,clearing skies,light winds,and high pressure

5.单项选择题What is the first visible indication of the presence of a tropical cyclone or hurricane().

A.Stratocumulus clouds or strange birds
B.Rain and increasing winds
C.An exceptionally long swell
D.Dark clouds and the“bar”of the storm

6.单项选择题Two well-developed high pressure areas may be separated by a().

A.Hill of low pressure
B.Trough of low pressure
C.Valley of low pressure
D.Ridge of low pressure

7.单项选择题Tropical cyclones are classified by form and intensity.Which system does not have closed isobars().

A.Hurricane
B.Tropical disturbance
C.Tropical depression
D.Cyclone

8.单项选择题The wind is()and decreasing.

A.anticlockwise rotating
B.anticlock rotating
C.clockwise rotating
D.clock rotating

9.单项选择题The strong wind will make us()here for some days.

A.To stay
B.Staying
C.Stay
D.Stayed

10.单项选择题The southeast trade winds actually blow toward the().

A.Southeast
B.South
C.East
D.Northwest