The reception was attended by various ______ members of the local community and representatives of regional industries.

A．a scanning probe microscope
B．a nanoscale device
C．a molecular beam epitaxy
D．a super computer

A．The two strands making up DNA's double helix can find each other easily in a complex chemical mixture
B．Evolution has solved the problem of building a computer smaller than a speck of dust a long time before
C．DNA not only programs cells to replicate themselves but also instructs them how to assemble individual molecules into new materials
D．The read-head components for computer hard drives are constructed by means of the technology known as a molecular beam epitaxy