One way to get consistent, valid data is to A. be sure that instruments are calibrated properly.
B. use simple instruments to make measurements.
C. select the best data to place into data tables.
D. make the measurements as quickly as possible.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.