单项选择题

The word "exceeded" in paragraph 1 most probably means______.

A．added up to
B．were more than
C．were about
D．were less than
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单项选择题
According to the passage, ______is the key factor to making Nowcasts a reality.
A．scientific and technological advances such as radar, or satellites
B．computer scientist
C．meteorologists
D．advanced computer programs
单项选择题
Conventional computer models of the atmosphere fails to predict such a short - lived tornado because______.
A．the computer is not used to forecast specific local events
B．the computers are not advanced enough to predict it
C．the weather data people collect are often wrong
D．weather conditions in some small regions are not available
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