单项选择题

A．By turning the intensity of sunshine into maps.
B．By analyzing the recent weather report.
C．By capturing the microwave radiation from the soil.
D．By analyzing information provided by ground observation centers.
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单项选择题
The biggest barrier to sounding the alarm about bird flu is that people usually take flu seriously.
A．Y
B．N
C．NG
单项选择题
A．A friend of his gave him the tickets as a present.B．A friend of his sold him these two tickets.C．He got the tickets free from charge from Pepsi .D．He bought the tickets at a black ticket market .
A．A friend of his gave him the tickets as a present.
B．A friend of his sold him these two tickets.
C．He got the tickets free from charge from "Pepsi".
D．He bought the tickets at a "black ticket market".
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