Disclosed herein is a system and method for language education using a meaning unit and a relational question. The anoscope includes a tubular body having a distal end, a proximal end, and a longitudinal axis defined therebetween, where the tubular body includes at least one elongated slot. A variety of new FET structures are described, all with the characteristic that at least some part of the FET’s channel has a different orientation than at least some part of the FET’s source andor drain. The motor moves the inner cannula within the outer cannula. The invention also relates to a method for the treatment or prophylaxis of parasitic infestations, including ectoparasitic andor endoparasitic infestations, of domestic animals comprising topically administering to said animal a pour-on pesticidal formulation to a region of the external surface of an animal extending from one flank to the opposing flank. In addition, a wastewater stream from the detoxification reactor is separated by a membrane filtration into a biomass-containing retentate stream and a purified permeate stream.