单项选择题

Passage One Questions 26 to 30 are based on the passage you have just heard.

A．Through online news groups.
B．In e-mail or mailing lists.
C．On websites.
D．Through big enterprises.
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单项选择题
A．Engineering.B．Computer science.C．Education.D．Science.
A．Engineering.
B．Computer science.
C．Education.
D．Science.
单项选择题
A．$ 50.B．$ 35.C．$ 38.D．$ 138.
A．$ 50.
B．$ 35.
C．$ 38.
D．$ 138.
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