单项选择题

From the context we can figure out that the phrase "pass for" in Para graph 3 means ______.

A．pose as
B．be accepted as
C．be equal to
D．act as
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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
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
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