单项选择题


Questions 11 to 18 are based on the conversation you have just heard.

A．Tea is better than coffee.
B．The man should switch to tea.
C．The man should drink coffee.
D．The man shouldn’t drink tea either.
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单项选择题
After radio had developed to a very high level, what appeared as a necessary result
A．Television and radar.
B．Modulated light and a scanning wheel.
C．Superior television camera.
D．Microphones and loudspeakers.
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