单项选择题

A "synoptic" weather map is a chart that ______.

A．summarizes a great deal of general weather information
B．appears daily and can be interpreted accurately
C．presents data on atmospheric conditions over a wide area
D．shows ever-changing fronts

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热门试题

单项选择题

The observation of weather conditions by satellites is advantageous be cause it ______.

A．uses electronic instruments
B．enables man to alter the weather
C．makes weather prediction easier
D．gives the scientist information not obtained readily otherwise

单项选择题

The thirty-day forecast is determined by examining ______.

A．daily weather maps
B．upper air levels
C．satellite reports
D．changing fronts