[单项选择]

A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time.
All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States weather Bureau issues informat
A. wind speed
B. thermal changes
C. fronts
D. barometric pressure

[单项选择]

A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time.
All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States weather Bureau issues informat
A. upper air levels
B. satellite reports
C. changing fronts
D. daily air maps

[单项选择]　　　 Geographers say that what defines a place are four properties: soil, climate, altitude, 　　　 and aspect, or attitude to the Sun. Florida’’s ancient scrub demonstrates this principle. Its 　　　 soil is pure silica, so barren it supports only lichens as ground cover.(It does, however, 　　　 sustain a sand-swimming lizard that cannot live where there is moisture or plant matter (5)　 the soil.) Its climate, despite more than 50 inches of annual rainfall, is blistering desert 　　　 plant life it can sustain is only the xerophytic, the quintessentially dry. Its altitude is a 　　　 mere couple of hundred feet, but it is high ground on a peninsula elsewhere close to sea 　　　 level, and its drainage is so critical that a difference of inches in elevation can bring major 　　　 changes in its plant communities. Its aspect is flat, direct, brutal―and subtropical. (10)　 Florida’’s surrounding lushness cannot impinge on its ’’desert scrubbiness. 　　　 This does not sound like an a
A. How geographers define a place
B. The characteristics of Florida’’s ancient scrub
C. An early naturalist’’s opinion of Florida
D. The history of the Lake Wales Ridge

[填空题]The weather forecast says the weather of tomorrow will be as (bad) ______ as that of today.

[简答题]marketing tool

[填空题]How’s the weather tomorrow
The weather reports predict ______ conditions with clear skies.