单项选择题

Which of the following is the function that nanoscale motors perform

A．rearranging individual atoms
B．manipulating individual atoms
C．producing products and process
D．photosynthesis and muscle concentration
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单项选择题
Who proved that Feyman's concept, There's Plenty of Room at the Bottom was right
A．Chad Mirkin at Northwestern University
B．Researchers at Almaden Research Center
C．Scientists manipulating atoms and "spray painting"
D．A professor at the California Institute of Technology
单项选择题
The school authority ______ against students' smoking both in the classrooms and at home.
A．resolved
B．determined
C．banned
D．prohibited
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