Technician A says that the basecoat may be applied directly over a self-etching primer. Technician B says that the acid in self-etching primer neutralizes as it dries. Who is right

What is the chief metrological difference between measuring with a microscope and with an electronic comparator? a. the microscope is limited to small workpieces.a. the microscope is limited to small workpieces. c. the comparator can only examine one point on the workpiece. d. the microscope carries its own standard.