单项选择题

"These tools" in the last sentence of the passage means ________.

A．weather forecast
B．knowledge
C．mathematics and physics
D．economic advantages of various kinds
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单项选择题
Which of the following is the best title for the passage
A．The Limitation of Meteorological Forecasting
B．New Advances in Synoptic Meteorology
C．Approaches to the Science of Meteorology
D．The Basic of Dynamic Meteorology
单项选择题
The passage tells us ________.
A．how to settle a consumer's complaint about a faulty item
B．how to make an effective complaint about a faulty item
C．how to avoid buying a faulty item
D．how to deal with complaints from customers.
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