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单项选择题

A．He is an expert of Johns Hopkins.
B．He specializes in human memory.
C．He is the author of the research report.
D．He is working for the U.S. Food and Drug Administration.
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热门试题

单项选择题A．Blankets and coffins.B．Mobiles.C．Emergency shelters.D．Psychologists.

A．Blankets and coffins.
B．Mobiles.
C．Emergency shelters.
D．Psychologists.

单项选择题A．How people improve their memory effectively.B．The role that caffeine plays in improving memory.C．The relationship between caffeine and health.D．How caffeine influences people s moods.

A．How people improve their memory effectively.
B．The role that caffeine plays in improving memory.
C．The relationship between caffeine and health.
D．How caffeine influences people"s moods.